
Émerger dans une nouvelle opportunité
Publié lemars 2, 2026parAlyssa de Wit|Les zones humides de la vallée Fraser, Actualités et événements, Grenouille maculée de l'Oregon, Pollinisateurs, Damier de Taylor, Tortue peinte de l'Ouest
Qu'est-ce que les programmes de rétablissement de la Colombie Britannique ? Dans les zones humides de la vallée du Fraser en Colombie Britannique, les tortues peintes de l'Ouest font face à de nombreux défis en tant qu'œufs et nouveau-nés, avec des taux de prédation élevés, la perte et la fragmentation de l'habitat, et aucun soin parental une fois éclos, ce qui mène à des populations non viables. Depuis 2012, nous améliorons leurs chances de survie en protégeant les nids, en récoltant les œufs vulnérables, en les incubant artificiellement et en donnant une longueur d'avance aux nouveau-nés avant leur relâchement dans la nature. De même, le damier de Taylor, une espèce en danger clé de voûte et indicateur environnemental, était autrefois considéré comme disparu du Canada jusqu'à sa redécouverte en 2005 sur l'île Denman. Depuis, CFC s'est concentré sur le renforcement de sa population sauvage en Colombie Britannique grâce à des efforts d'élevage de conservation et de restauration de l'habitat.
Ensemble, ces initiatives visent à améliorer la survie des deux espèces dans leurs écosystèmes. Le zoo du Grand Vancouver soutient ces deux programmes par ses installations et son expertise collaborative.
Walking into the turtle lab, I was overwhelmed by one thing: fog! Only because it was a cool morning and I wear glasses, and if you know anything about housing turtles, you’ll know they are kept in a warm, humid environment. Once my vision began to clear, the work began.
My name is Alyssa de Wit, and I am the new B.C. Projects Conservation Assistant supporting the conservation of the Oregon spotted frog, Taylor’s checkerspot butterfly, and western painted turtle. I previously worked with WPC in the summer of 2025 as a turtle nest monitor in Chilliwack. I am enthusiastic about expanding my hands-on experience with these endangered species, assisting with breeding, incubation, release, and more!
It can be fun to start a new job at the beginning of the year; new work, new experiences, new me! However, depending on the species, starting in February means many individuals are sleeping. The dozen adult turtles, including Tutu, and Oregon spotted frogs brumate (a form of hibernation in cold-blooded animals) from around October to March in the fridge and outdoor tubs, respectively; read “The coolest winter destination” blog for more information. Taylor’s checkerspot butterflies undergo diapause (dormant phase) as larvae from September to February. However, though many may be sleeping, that doesn’t mean that we are!
Last year, 250 hatched western painted turtles were kept for head-starting, during which they eat and grow in the winter to better protect themselves from predators once released. One of the first tasks I was taught was feeding and cleaning the turtles. A variety of foods, including bloodworms, crickets, krill, shrimp, and sole fillets, are fed every morning. Once the turtles are satiated, cleaning commences!
Size determines the appropriate housing for the turtles (see above). Clear, rectangular tubs stacked on shelves are used for the smallest turtles; biofilters lining the edge of the room, consisting of two tubs: one with turtles and the other to circulate and heat the water; and large round tubs for the turtles over 30 grams waiting to be released. Every day, each tub is either siphoned or netted to remove excrement and any remaining food. All tubs are also deep cleaned periodically, with all water removed and scrubbed.
Taylor’s checkerspot butterflies overwinter as larvae; they begin waking up in mid-February as temperatures rise. In winter, due to the limited supply of fresh plantain, a prominent food given to the caterpillars, we use freeze-dried plantain, which is mixed with water to create a paste, then smeared onto a microscope slide (pictured above). This seemed to be just what the caterpillar ordered!
Wildlife Preservation Canada has been working over the last 40 years to save animals at risk in Canada. They use science-based techniques such as conservation breeding and release, reintroduction, and translocation for reptiles, amphibians, birds, insects, and mammals. In 2025, through WPC’s efforts, 8,852 animals were bred in conservation facilities, and 4,661 individuals were released into the wild. This year, I am enthusiastic about the conservation efforts that lie ahead and the milestones that can be achieved!
Nous avons besoin de votre aide