{"id":13870,"date":"2021-04-07T13:03:44","date_gmt":"2021-04-07T18:03:44","guid":{"rendered":"https:\/\/wildlifepreservation.ca\/blog\/?p=13870"},"modified":"2026-07-22T09:04:31","modified_gmt":"2026-07-22T14:04:31","slug":"breeding-season-science","status":"publish","type":"post","link":"https:\/\/wildlifepreservation.ca\/fr\/blog\/breeding-season-science\/","title":{"rendered":"Breeding season science"},"content":{"rendered":"<div id='av_section_1'  class='avia-section av-a1kwu3y-291be81317d67582ed11abea69d3f5bd main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_section  avia-builder-el-first  blog-inner avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><main  role=\"main\" itemprop=\"mainContentOfPage\"  class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-13870'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mrw5ek2s-30523216acc489d673b09964cc92d99f\">\n.avia-image-container.av-mrw5ek2s-30523216acc489d673b09964cc92d99f img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-mrw5ek2s-30523216acc489d673b09964cc92d99f .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-mrw5ek2s-30523216acc489d673b09964cc92d99f av-styling- avia-align-center  avia-builder-el-1  el_before_av_heading  avia-builder-el-first  inner-blog-banner-full-width-img'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-54031 avia-img-lazy-loading-not-54031 avia_image' src='https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2021\/04\/BreedingSeasonScience_OregonSpottedFrog.png' alt='Oregon spotted frog with a redish-brown colour and black spots' title='BreedingSeasonScience_OregonSpottedFrog'  height=\"738\" width=\"1019\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mrw5a5h7-ca62ed8f7022a8a0477cbe578fe910d6\">\n#top .av-special-heading.av-mrw5a5h7-ca62ed8f7022a8a0477cbe578fe910d6{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-mrw5a5h7-ca62ed8f7022a8a0477cbe578fe910d6 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-mrw5a5h7-ca62ed8f7022a8a0477cbe578fe910d6 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-mrw5a5h7-ca62ed8f7022a8a0477cbe578fe910d6 av-special-heading-h1 blockquote modern-quote modern-centered  avia-builder-el-2  el_after_av_image  el_before_av_post_metadata'><h1 class='av-special-heading-tag'  itemprop=\"headline\"  >Breeding season science<\/h1><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-9i1rwoe-f372c07e5badfccc0d004694c66c0de8\">\n#top .av-post-metadata-container.av-9i1rwoe-f372c07e5badfccc0d004694c66c0de8{\nfont-size:16px;\n}\n#top .av-post-metadata-container.av-9i1rwoe-f372c07e5badfccc0d004694c66c0de8 .av-post-metadata-container-inner{\nfont-size:16px;\n}\n<\/style>\n<div  class='av-post-metadata-container av-9i1rwoe-f372c07e5badfccc0d004694c66c0de8 av-metadata-container-align-left  avia-builder-el-3  el_after_av_heading  avia-builder-el-last  av-metadata-container-1'><div class='av-post-metadata-container-inner'><span class=\"av-post-metadata-content av-post-metadata-meta-content\"><span class=\"av-post-metadata-content av-post-metadata-published\"><span class=\"av-metadata-before av-metadata-before-published\">Publi\u00e9 le<\/span><span class=\"av-post-metadata-published-date\" >avril 7, 2021<\/span><\/span><span class=\"av-post-metadata-content av-post-metadata-separator\"><\/span><span class=\"av-post-metadata-content av-post-metadata-author\"  itemprop=\"author\" ><span class=\"av-metadata-before av-metadata-before-author\">par<\/span><span class=\"av-post-metadata-author-name\" >B.C. Wetlands Species Recovery<\/span><\/span><span class=\"av-post-metadata-content av-post-metadata-separator\"><\/span><span class=\"av-post-metadata-content av-post-metadata-category\"><span class=\"av-metadata-before av-metadata-before-categories\">|<\/span><span class=\"av-post-metadata-category-link\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/category\/news-and-events\/\" >Actualit\u00e9s et \u00e9v\u00e9nements<\/a><\/span>, <span class=\"av-post-metadata-category-link\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/species\/oregon-spotted-frog-program\/\" >Grenouille macul\u00e9e de l'Oregon<\/a><\/span><\/span><\/span><\/div><\/div>\n\n<\/div><\/div><\/main><!-- close content main element --><\/div><\/div><div id='av_section_2'  class='avia-section av-7rpzl5a-c7f03b7915a564de26ba8b57b7b96f92 main_color avia-section-default avia-no-border-styling  avia-builder-el-4  el_after_av_section  el_before_av_section  species-inner-content-intro-wrapper avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-13870'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-77n32fi-023ee5741ea08615a7060222c4b53478\">\n.flex_column.av-77n32fi-023ee5741ea08615a7060222c4b53478{\npadding:25px 25px 25px 25px;\nbackground-color:#f8fbf4;\n}\n<\/style>\n<div  class='flex_column av-77n32fi-023ee5741ea08615a7060222c4b53478 av_one_full  avia-builder-el-5  el_before_av_one_full  avia-builder-el-first  light-section first flex_column_div'     ><section  class='av_textblock_section av-mrw5ezyr-2516068850a8d315a4e93c0f25211d27'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p class=\"p1\"><b>Qu'est-ce que le Programme de r\u00e9tablissement de la grenouille macul\u00e9e de l'Oregon ?<\/b> Since 2010, WPC has been breeding the endangered Oregon spotted frog at the Greater Vancouver Zoo, and reintroducing thousands of tadpoles and froglets back into wetlands in B.C.\u2019s Fraser Valley. It takes years of careful observation, collaboration, ingenuity and sometimes a little luck to crack the code to breeding specific species. For several years, our progress was very limited. But our team persevered. Today, WPC has pioneered breeding techniques that are turning the tide for this species.<\/p>\n<\/div><\/section><\/div><div  class='flex_column av-6ihrbym-42ab462a5555c613afaa76beb49742e3 av_one_full  avia-builder-el-7  el_after_av_one_full  el_before_av_one_full  first flex_column_div  column-top-margin'     ><section  class='av_textblock_section av-mrw5fw3x-f5e8689f11a5befcded7dae783c2a82e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The goal of conservation breeding is to breed animals in controlled environments for the purpose of releasing them back into the wild. When it comes to breeding animals in captivity, there are usually difficulties and issues. These challenges can be the result of many factors, such as lack of knowledge of their breeding behaviour, enclosure requirements, and special dietary needs.<\/p>\n<p>Solving the conservation breeding issues\u00a0 are critical, especially when dealing with species that are not commonly bred in captivity, such as endangered amphibians. Amphibians in captivity can face many reproductive dysfunctions. These dysfunctions in frogs and toads depend on multiple factors, including gamete (sperm and egg) quality in both sexes, genetics, husbandry and missing environmental stimuli that trigger reproduction. Either alone or in combination, these are the root causes often cited for the total or partial inhibition of reproduction currently observed in the majority of captive amphibian populations. For this reason, much research is required to determine and fix these dysfunctions.<\/p>\n<p>WPC\u2019s <a href=\"https:\/\/wildlifepreservation.ca\/fr\/fraser-valley-wetlands-wildlife\/\">breeding program for Canada&#8217;s most endangered amphibian, the Oregon spotted frog<\/a> (<em>Rana pretiosa<\/em>), OSF for short, certainly presents its challenges. Fortunately, with the help of our partners at Toronto Zoo, we are working to better understand and solve these challenges. Part of this project is analyzing OSF&#8217;s sperm quality and factors that are affecting its quality.<\/p>\n<p><strong><em>The key question that might come to mind is &#8211; how do we collect sperm from a frog?<\/em><\/strong><\/p>\n<p>Well, it is an interesting process. Firstly, most frogs are external fertilizers; hence they do not have an external organ dedicated to breeding. Secondly, frogs usually release sperm while they urinate, so in order to collect sperm, we need to gather a sample of the frog\u2019s urine. Usually, biologists collect urine with a pipet from outside the cloaca or in our case, we insert catheters and collect urine directly from the cloaca. These methods may differ from one species to another.<\/p>\n<p>However in OSF sperm is not present in the urine when collected by this means. To make sure we have enough sperm for analysis, we use hormones that trigger the frogs to release sperm. The two hormones biologists mostly use in breeding programs are Human Chorionic Gonadotropin (HCG) and luteinizing hormone-releasing hormone (LHRH), also known as Gonadotropin-releasing hormone (GnRH). Biologists usually use either one or a combination of the two hormones. The dosage of hormones may differ between species, and for most species such as the OSF, the effect of different dosages of hormones is currently unknown.<\/p>\n<\/div><\/section><\/div><div  class='flex_column av-6e777bi-506ce3234ae83da65740d061568503b3 av_one_full  avia-builder-el-9  el_after_av_one_full  el_before_av_one_full  first flex_column_div  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mrw5gbb1-438ae088850835d1bb45f01ace9499be\">\n.avia-image-container.av-mrw5gbb1-438ae088850835d1bb45f01ace9499be img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-mrw5gbb1-438ae088850835d1bb45f01ace9499be .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-mrw5gbb1-438ae088850835d1bb45f01ace9499be av-styling- avia-align-center  avia-builder-el-10  el_before_av_hr  avia-builder-el-first'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-54032 avia-img-lazy-loading-not-54032 avia_image' src='https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2021\/04\/BreedingSeasonScience_PouryaSardariSampling.png' alt='' title='BreedingSeasonScience_PouryaSardariSampling'  height=\"738\" width=\"1019\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-5rf90zy-4fd02bde27026cdfc0ac1635c0690b7f\">\n#top .hr.hr-invisible.av-5rf90zy-4fd02bde27026cdfc0ac1635c0690b7f{\nheight:15px;\n}\n<\/style>\n<div  class='hr av-5rf90zy-4fd02bde27026cdfc0ac1635c0690b7f hr-invisible  avia-builder-el-11  el_after_av_image  el_before_av_textblock'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-mrw5gio0-02615c9cbfe4233f41b5017f7058ba25'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><em>Pourya Sardari sampling sperm from an Oregon spotted frog<\/em><\/p>\n<\/div><\/section><\/p><\/div><div  class='flex_column av-5g7izou-72ad0afef3fd36649a5811206a9b58d8 av_one_full  avia-builder-el-13  el_after_av_one_full  el_before_av_hr  first flex_column_div  column-top-margin'     ><section  class='av_textblock_section av-mrw5gpoo-f627312937f6a3fdde4d14cc994c8b37'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>This breeding season we are completing research into this process. The purpose of the current project, which is still in its early stages, is to determine what will happen to OSF&#8217;s sperm at different hormone dosages.<\/p>\n<p>Conservation breeding can be quite challenging, especially with species that are not very common. Fortunately, with the help of science and technologies, we can improve the captive breeding programs&#8217; outcomes, producing more and healthier individuals to release back into the wild.<\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4oz4hu6-afde746b9bbc0cf00793eba7f37b94c7\">\n#top .hr.hr-invisible.av-4oz4hu6-afde746b9bbc0cf00793eba7f37b94c7{\nheight:50px;\n}\n<\/style>\n<div  class='hr av-4oz4hu6-afde746b9bbc0cf00793eba7f37b94c7 hr-invisible  avia-builder-el-15  el_after_av_one_full  avia-builder-el-last'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='av_section_3'  class='avia-section av-49svab2-3bb489b0bd9a39b4b61400680665bc0a main_color avia-section-default avia-no-border-styling  avia-builder-el-16  el_after_av_section  el_before_av_section  blog-inner avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-13870'><div class='entry-content-wrapper clearfix'>\n<div  class='flex_column av-3xuw17y-d1ec48b4c093f897eb7f26d0fd2cf8ac av_one_full  avia-builder-el-17  avia-builder-el-no-sibling  author-section first flex_column_div'     ><section  class='av_textblock_section av-mrw5h3y9-6687b39ab98e1510f5a3fdcc2bd8f8a3'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h3 class=\"et_pb_module_header\">Andrea Gielens<\/h3>\n<h5 class=\"et_pb_member_position\">Lead Biologist &#8211; Fraser Valley Wetlands Recovery Program<em><strong><br \/>\n<\/strong><\/em><\/h5>\n<p>Andrea manages WPC&#8217;s captive breeding and release programs for the Oregon spotted frog and the coastal western painted turtle. Andrea has studied at-risk reptiles and amphibians in Canada and abroad, including a term at the Durrell Wildlife Conservation Trust in Jersey. Andrea also manages the Taylor&#8217;s checkerspot butterfly recovery program in BC.<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mrw5hi1x-8900a9461cc097947155b54aea0bbc62\">\n.avia-image-container.av-mrw5hi1x-8900a9461cc097947155b54aea0bbc62 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-mrw5hi1x-8900a9461cc097947155b54aea0bbc62 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-mrw5hi1x-8900a9461cc097947155b54aea0bbc62 av-styling- avia-align-center  avia-builder-el-19  el_after_av_textblock  avia-builder-el-last  author-pic'   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img fetchpriority=\"high\" class='wp-image-30520 avia-img-lazy-loading-not-30520 avia_image' src='https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2020\/06\/Andrea-gielens-for-bio.jpg' alt='' title='Andrea-gielens-for-bio'  height=\"1000\" width=\"1000\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div><\/p><\/div>\n\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><div id='blog-inner'  class='avia-section av-3lh0ia6-505b48142b8a105b1984cdb130708975 main_color avia-section-default avia-no-border-styling  avia-builder-el-20  el_after_av_section  el_before_av_section  blog-section avia-bg-style-scroll container_wrap fullsize'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-13870'><div class='entry-content-wrapper clearfix'>\n<div  id=\"recent-articles-project\"  class='flex_column av-2wbv7am-9bea12607a02cbf00c94105a810d1f24 av_one_full  avia-builder-el-21  el_before_av_one_full  avia-builder-el-first  more-articles-section first flex_column_div'     ><section  class='av_textblock_section av-2hfunda-149d659de2126ead50de0f3c7b661ef4'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2>Articles r\u00e9cents sur le projet<\/h2>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-736oku-d315d680145e0e9a4f8106438c0dd854\">\n#top .flex_column.av-736oku-d315d680145e0e9a4f8106438c0dd854{\nmargin-top:20px;\nmargin-bottom:15px;\n}\n.responsive #top #wrap_all .flex_column.av-736oku-d315d680145e0e9a4f8106438c0dd854{\nmargin-top:20px;\nmargin-bottom:15px;\n}\n<\/style>\n<div  class='flex_column av-736oku-d315d680145e0e9a4f8106438c0dd854 av_one_full  avia-builder-el-23  el_after_av_one_full  avia-builder-el-last  first flex_column_div  column-top-margin'     ><div  class='av-alb-blogposts template-blog  blog-home'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Blog\" ><article class=\"post-entry post-entry-type-standard post-entry-53001 post-loop-1 post-parity-odd single-big with-slider post-53001 post type-post status-publish format-standard has-post-thumbnail hentry category-news-and-events category-oregon_spotted_frog project-fraser-valley-wetlands specific-species-oregon-spotted-frog-program\"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" ><div class=\"blog-meta\"><\/div><div class='entry-content-wrapper clearfix standard-content'><header class=\"entry-content-header\" aria-label=\"Post: On to freedom\"><div class=\"av-heading-wrapper\"><h2 class='post-title entry-title'  itemprop=\"headline\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/on-to-freedom\/\" rel=\"bookmark\" title=\"Permanent Link: On to freedom\">En route vers la libert\u00e9<span class=\"post-format-icon minor-meta\"><\/span><\/a><\/h2><span class=\"blog-categories minor-meta\"><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/category\/news-and-events\/\" rel=\"tag\">Actualit\u00e9s et \u00e9v\u00e9nements<\/a>, <a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/category\/oregon_spotted_frog\/\" rel=\"tag\">Grenouille macul\u00e9e de l'Oregon<\/a> <a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/project\/fraser-valley-wetlands\/\" rel=\"tag\">Les zones humides de la vall\u00e9e Fraser<\/a> <a href=\"https:\/\/wildlifepreservation.ca\/fr\/species\/oregon-spotted-frog-program\/\" rel=\"tag\">Grenouille macul\u00e9e de l'Oregon<\/a><\/span><\/div><\/header><span class=\"av-vertical-delimiter\"><\/span><div class=\"big-preview single-big\"  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/on-to-freedom\/\"  title=\"Blog photo reformatage - OnToFreedom_BriarObtenirDesT\u00eatardsPourRel\u00e2chement_AlyssadeWit\" ><img decoding=\"async\" loading=\"lazy\" width=\"400\" height=\"400\" src=\"https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/05\/OnToFreedom_BriarGettingTadpolesForRelease_AlyssadeWit_Thumbnail.jpg\" class=\"wp-image-53014 avia-img-lazy-loading-53014 attachment-entry_without_sidebar size-entry_without_sidebar wp-post-image\" alt=\"\" srcset=\"https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/05\/OnToFreedom_BriarGettingTadpolesForRelease_AlyssadeWit_Thumbnail.jpg 400w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/05\/OnToFreedom_BriarGettingTadpolesForRelease_AlyssadeWit_Thumbnail-300x300.jpg 300w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/05\/OnToFreedom_BriarGettingTadpolesForRelease_AlyssadeWit_Thumbnail-80x80.jpg 80w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/05\/OnToFreedom_BriarGettingTadpolesForRelease_AlyssadeWit_Thumbnail-12x12.jpg 12w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/05\/OnToFreedom_BriarGettingTadpolesForRelease_AlyssadeWit_Thumbnail-36x36.jpg 36w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/05\/OnToFreedom_BriarGettingTadpolesForRelease_AlyssadeWit_Thumbnail-180x180.jpg 180w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/div><div class=\"entry-content\"  itemprop=\"text\" ><div class=\"read-more-link\"><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/on-to-freedom\/\" class=\"more-link\">Read more<span class='more-link-arrow avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='right-open-big' data-av_iconset='svg_entypo-fontello'><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewbox=\"0 0 15 32\" preserveaspectratio=\"xMidYMid meet\" role=\"graphics-symbol\" aria-hidden=\"true\">\n<path d=\"M0.416 27.84l11.456-11.84-11.456-11.904q-0.832-0.832 0-1.536 0.832-0.832 1.536 0l12.544 12.608q0.768 0.832 0 1.6l-12.544 12.608q-0.704 0.832-1.536 0-0.832-0.704 0-1.536z\"><\/path>\n<\/svg><\/span><\/a><\/div>\n<\/div><span class=\"post-meta-infos\"><time class=\"date-container minor-meta updated\"  itemprop=\"datePublished\" datetime=\"2026-05-13T13:12:16-05:00\" >13 mai 2026<\/time><span class=\"text-sep\">\/<\/span><span class=\"blog-author minor-meta\">par <span class=\"entry-author-link\"  itemprop=\"author\" ><span class=\"author\"><span class=\"fn\"><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/author\/alyssa-de-wit\/\" rel=\"author\">Alyssa de Wit<\/a><\/span><\/span><\/span><\/span><\/span><footer class=\"entry-footer\"><\/footer><div class='post_delimiter'><\/div><\/div><div class=\"post_author_timeline\"><\/div><span class='hidden'>\n\t\t\t\t<span class='av-structured-data'  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" >\n\t\t\t\t\t\t<span itemprop='url'>https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/05\/OnToFreedom_BriarGettingTadpolesForRelease_AlyssadeWit_Thumbnail.jpg<\/span>\n\t\t\t\t\t\t<span itemprop='height'>400<\/span>\n\t\t\t\t\t\t<span itemprop='width'>400<\/span>\n\t\t\t\t<\/span>\n\t\t\t\t<span class='av-structured-data'  itemprop=\"publisher\" itemtype=\"https:\/\/schema.org\/Organization\" itemscope=\"itemscope\" >\n\t\t\t\t\t\t<span itemprop='name'>Alyssa de Wit<\/span>\n\t\t\t\t\t\t<span itemprop='logo' itemscope itemtype='https:\/\/schema.org\/ImageObject'>\n\t\t\t\t\t\t\t<span itemprop='url'>https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/06\/WPC_Frn-scaled.jpg<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span><span class='av-structured-data'  itemprop=\"author\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Person\" ><span itemprop='name'>Alyssa de Wit<\/span><\/span><span class='av-structured-data'  itemprop=\"datePublished\" datetime=\"2026-05-13T13:12:16-05:00\" >2026-05-13 13:12:16<\/span><span class='av-structured-data'  itemprop=\"dateModified\" itemtype=\"https:\/\/schema.org\/dateModified\" >2026-05-13 13:12:42<\/span><span class='av-structured-data'  itemprop=\"mainEntityOfPage\" itemtype=\"https:\/\/schema.org\/mainEntityOfPage\" ><span itemprop='name'>En route vers la libert\u00e9<\/span><\/span><\/span><\/article><article class=\"post-entry post-entry-type-standard post-entry-52701 post-loop-2 post-parity-even single-big with-slider post-52701 post type-post status-publish format-standard has-post-thumbnail hentry category-news-and-events category-oregon_spotted_frog project-fraser-valley-wetlands specific-species-oregon-spotted-frog-program\"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" ><div class=\"blog-meta\"><\/div><div class='entry-content-wrapper clearfix standard-content'><header class=\"entry-content-header\" aria-label=\"Post: Froggie investigation\"><div class=\"av-heading-wrapper\"><h2 class='post-title entry-title'  itemprop=\"headline\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/frog-detective-on-the-case\/\" rel=\"bookmark\" title=\"Permanent Link: Froggie investigation\">Enqu\u00eate sur les grenouilles<span class=\"post-format-icon minor-meta\"><\/span><\/a><\/h2><span class=\"blog-categories minor-meta\"><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/category\/news-and-events\/\" rel=\"tag\">Actualit\u00e9s et \u00e9v\u00e9nements<\/a>, <a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/category\/oregon_spotted_frog\/\" rel=\"tag\">Grenouille macul\u00e9e de l'Oregon<\/a> <a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/project\/fraser-valley-wetlands\/\" rel=\"tag\">Les zones humides de la vall\u00e9e Fraser<\/a> <a href=\"https:\/\/wildlifepreservation.ca\/fr\/species\/oregon-spotted-frog-program\/\" rel=\"tag\">Grenouille macul\u00e9e de l'Oregon<\/a><\/span><\/div><\/header><span class=\"av-vertical-delimiter\"><\/span><div class=\"big-preview single-big\"  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/frog-detective-on-the-case\/\"  title=\"2026JoelleKrol_Miniature\" ><img decoding=\"async\" loading=\"lazy\" width=\"400\" height=\"400\" src=\"https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/04\/2026JoelleKrol_Thumbnail.jpg\" class=\"wp-image-52712 avia-img-lazy-loading-52712 attachment-entry_without_sidebar size-entry_without_sidebar wp-post-image\" alt=\"\" srcset=\"https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/04\/2026JoelleKrol_Thumbnail.jpg 400w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/04\/2026JoelleKrol_Thumbnail-300x300.jpg 300w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/04\/2026JoelleKrol_Thumbnail-80x80.jpg 80w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/04\/2026JoelleKrol_Thumbnail-12x12.jpg 12w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/04\/2026JoelleKrol_Thumbnail-36x36.jpg 36w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/04\/2026JoelleKrol_Thumbnail-180x180.jpg 180w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/div><div class=\"entry-content\"  itemprop=\"text\" ><div class=\"read-more-link\"><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/frog-detective-on-the-case\/\" class=\"more-link\">Read more<span class='more-link-arrow avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='right-open-big' data-av_iconset='svg_entypo-fontello'><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewbox=\"0 0 15 32\" preserveaspectratio=\"xMidYMid meet\" role=\"graphics-symbol\" aria-hidden=\"true\">\n<path d=\"M0.416 27.84l11.456-11.84-11.456-11.904q-0.832-0.832 0-1.536 0.832-0.832 1.536 0l12.544 12.608q0.768 0.832 0 1.6l-12.544 12.608q-0.704 0.832-1.536 0-0.832-0.704 0-1.536z\"><\/path>\n<\/svg><\/span><\/a><\/div>\n<\/div><span class=\"post-meta-infos\"><time class=\"date-container minor-meta updated\"  itemprop=\"datePublished\" datetime=\"2026-04-22T10:05:16-05:00\" >22 avril 2026<\/time><span class=\"text-sep\">\/<\/span><span class=\"blog-author minor-meta\">par <span class=\"entry-author-link\"  itemprop=\"author\" ><span class=\"author\"><span class=\"fn\"><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/author\/wildlife-preservation-canada\/\" rel=\"author\">Wildlife Preservation Canada<\/a><\/span><\/span><\/span><\/span><\/span><footer class=\"entry-footer\"><\/footer><div class='post_delimiter'><\/div><\/div><div class=\"post_author_timeline\"><\/div><span class='hidden'>\n\t\t\t\t<span class='av-structured-data'  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" >\n\t\t\t\t\t\t<span itemprop='url'>https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/04\/2026JoelleKrol_Thumbnail.jpg<\/span>\n\t\t\t\t\t\t<span itemprop='height'>400<\/span>\n\t\t\t\t\t\t<span itemprop='width'>400<\/span>\n\t\t\t\t<\/span>\n\t\t\t\t<span class='av-structured-data'  itemprop=\"publisher\" itemtype=\"https:\/\/schema.org\/Organization\" itemscope=\"itemscope\" >\n\t\t\t\t\t\t<span itemprop='name'>Wildlife Preservation Canada<\/span>\n\t\t\t\t\t\t<span itemprop='logo' itemscope itemtype='https:\/\/schema.org\/ImageObject'>\n\t\t\t\t\t\t\t<span itemprop='url'>https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/06\/WPC_Frn-scaled.jpg<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span><span class='av-structured-data'  itemprop=\"author\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Person\" ><span itemprop='name'>Wildlife Preservation Canada<\/span><\/span><span class='av-structured-data'  itemprop=\"datePublished\" datetime=\"2026-04-22T10:05:16-05:00\" >2026-04-22 10:05:16<\/span><span class='av-structured-data'  itemprop=\"dateModified\" itemtype=\"https:\/\/schema.org\/dateModified\" >2026-04-28 12:37:50<\/span><span class='av-structured-data'  itemprop=\"mainEntityOfPage\" itemtype=\"https:\/\/schema.org\/mainEntityOfPage\" ><span itemprop='name'>Enqu\u00eate sur les grenouilles<\/span><\/span><\/span><\/article><article class=\"post-entry post-entry-type-standard post-entry-48961 post-loop-3 post-parity-odd post-entry-last single-big with-slider post-48961 post type-post status-publish format-standard has-post-thumbnail hentry category-news-and-events category-oregon_spotted_frog project-fraser-valley-wetlands specific-species-oregon-spotted-frog-program specific-species-species-at-risk\"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" ><div class=\"blog-meta\"><\/div><div class='entry-content-wrapper clearfix standard-content'><header class=\"entry-content-header\" aria-label=\"Post: What is the difference between frogs and toads?\"><div class=\"av-heading-wrapper\"><h2 class='post-title entry-title'  itemprop=\"headline\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/difference-between-frogs-and-toads\/\" rel=\"bookmark\" title=\"Permanent Link: What is the difference between frogs and toads?\">Quelle est la diff\u00e9rence entre les grenouilles et les crapauds ?<span class=\"post-format-icon minor-meta\"><\/span><\/a><\/h2><span class=\"blog-categories minor-meta\"><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/category\/news-and-events\/\" rel=\"tag\">Actualit\u00e9s et \u00e9v\u00e9nements<\/a>, <a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/category\/oregon_spotted_frog\/\" rel=\"tag\">Grenouille macul\u00e9e de l'Oregon<\/a> <a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/project\/fraser-valley-wetlands\/\" rel=\"tag\">Les zones humides de la vall\u00e9e Fraser<\/a> <a href=\"https:\/\/wildlifepreservation.ca\/fr\/species\/oregon-spotted-frog-program\/\" rel=\"tag\">Grenouille macul\u00e9e de l'Oregon<\/a>, <a href=\"https:\/\/wildlifepreservation.ca\/fr\/species\/species-at-risk\/\" rel=\"tag\">Esp\u00e8ces menac\u00e9es<\/a><\/span><\/div><\/header><span class=\"av-vertical-delimiter\"><\/span><div class=\"big-preview single-big\"  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/difference-between-frogs-and-toads\/\"  title=\"GrenouilleVSToile_Miniature\" ><img decoding=\"async\" loading=\"lazy\" width=\"400\" height=\"400\" src=\"https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2025\/01\/FrogVSToad_Thumbnail.png\" class=\"wp-image-48969 avia-img-lazy-loading-48969 attachment-entry_without_sidebar size-entry_without_sidebar wp-post-image\" alt=\"\" srcset=\"https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2025\/01\/FrogVSToad_Thumbnail.png 400w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2025\/01\/FrogVSToad_Thumbnail-300x300.png 300w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2025\/01\/FrogVSToad_Thumbnail-80x80.png 80w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2025\/01\/FrogVSToad_Thumbnail-12x12.png 12w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2025\/01\/FrogVSToad_Thumbnail-36x36.png 36w, https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2025\/01\/FrogVSToad_Thumbnail-180x180.png 180w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/div><div class=\"entry-content\"  itemprop=\"text\" ><div class=\"read-more-link\"><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/difference-between-frogs-and-toads\/\" class=\"more-link\">Read more<span class='more-link-arrow avia-svg-icon avia-font-svg_entypo-fontello' data-av_svg_icon='right-open-big' data-av_iconset='svg_entypo-fontello'><svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"15\" height=\"32\" viewbox=\"0 0 15 32\" preserveaspectratio=\"xMidYMid meet\" role=\"graphics-symbol\" aria-hidden=\"true\">\n<path d=\"M0.416 27.84l11.456-11.84-11.456-11.904q-0.832-0.832 0-1.536 0.832-0.832 1.536 0l12.544 12.608q0.768 0.832 0 1.6l-12.544 12.608q-0.704 0.832-1.536 0-0.832-0.704 0-1.536z\"><\/path>\n<\/svg><\/span><\/a><\/div>\n<\/div><span class=\"post-meta-infos\"><time class=\"date-container minor-meta updated\"  itemprop=\"datePublished\" datetime=\"2025-01-19T11:40:35-05:00\" >19 janvier 2025<\/time><span class=\"text-sep\">\/<\/span><span class=\"blog-author minor-meta\">par <span class=\"entry-author-link\"  itemprop=\"author\" ><span class=\"author\"><span class=\"fn\"><a href=\"https:\/\/wildlifepreservation.ca\/fr\/blog\/author\/wildlife-preservation-canada\/\" rel=\"author\">Wildlife Preservation Canada<\/a><\/span><\/span><\/span><\/span><\/span><footer class=\"entry-footer\"><\/footer><div class='post_delimiter'><\/div><\/div><div class=\"post_author_timeline\"><\/div><span class='hidden'>\n\t\t\t\t<span class='av-structured-data'  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" >\n\t\t\t\t\t\t<span itemprop='url'>https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2025\/01\/FrogVSToad_Thumbnail.png<\/span>\n\t\t\t\t\t\t<span itemprop='height'>400<\/span>\n\t\t\t\t\t\t<span itemprop='width'>400<\/span>\n\t\t\t\t<\/span>\n\t\t\t\t<span class='av-structured-data'  itemprop=\"publisher\" itemtype=\"https:\/\/schema.org\/Organization\" itemscope=\"itemscope\" >\n\t\t\t\t\t\t<span itemprop='name'>Wildlife Preservation Canada<\/span>\n\t\t\t\t\t\t<span itemprop='logo' itemscope itemtype='https:\/\/schema.org\/ImageObject'>\n\t\t\t\t\t\t\t<span itemprop='url'>https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2026\/06\/WPC_Frn-scaled.jpg<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span><span class='av-structured-data'  itemprop=\"author\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Person\" ><span itemprop='name'>Wildlife Preservation Canada<\/span><\/span><span class='av-structured-data'  itemprop=\"datePublished\" datetime=\"2025-01-19T11:40:35-05:00\" >2025-01-19 11:40:35<\/span><span class='av-structured-data'  itemprop=\"dateModified\" itemtype=\"https:\/\/schema.org\/dateModified\" >2026-07-22 14:55:00<\/span><span class='av-structured-data'  itemprop=\"mainEntityOfPage\" itemtype=\"https:\/\/schema.org\/mainEntityOfPage\" ><span itemprop='name'>Quelle est la diff\u00e9rence entre les grenouilles et les crapauds ?<\/span><\/span><\/span><\/article><\/div><\/div>\n\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mrw5j5tg-6570821c9f049373f32930422daf1c92\">\n.avia-section.av-mrw5j5tg-6570821c9f049373f32930422daf1c92{\nbackground-repeat:no-repeat;\nbackground-image:url(https:\/\/wildlifepreservation.ca\/wp-content\/uploads\/2023\/03\/Oregon-spotted-frog.jpg);\nbackground-position:50% 50%;\nbackground-attachment:scroll;\n}\n<\/style>\n<div id='av_section_5'  class='avia-section av-mrw5j5tg-6570821c9f049373f32930422daf1c92 main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_section  avia-builder-el-first  need-your-help-wrapper avia-full-stretch avia-bg-style-scroll container_wrap fullsize'  data-section-bg-repeat='stretch'><div class='container av-section-cont-open' ><main  role=\"main\" itemprop=\"mainContentOfPage\"  class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-13870'><div class='entry-content-wrapper clearfix'>\n<div  class='flex_column 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><\/span><\/a><\/div><\/p><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":51,"featured_media":54033,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[10],"tags":[],"class_list":["post-13870","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-and-events","specific-species-oregon-spotted-frog-program"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Breeding season science - Wildlife Preservation Canada<\/title>\n<meta name=\"description\" content=\"Wildlife Preservation Canada\u2019s mission is to save animal species at risk from extinction in Canada by providing direct, hands-on care.Learn more about\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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