The rusty-patched bumble bee gets its name from the rust-coloured patch found on the abdomens of workers and males. They also have distinctively short tongues. This means they occasionally “nectar-rob” flowers by piercing a hole through the back to access the nectar that their short tongues can’t reach. Spring queens emerge in early April, and the workers, males and new queens can live until late October, making it the species with the longest colony cycle in eastern North America.