Re:This is one type; others have less decline (Score 2)

I wish. As someone who has worked in an entomology lab 6 years ago, it was almost unheard of to collect this species. Only one species of bumblebee is really doing so well, B. impatiens. The others, including this one, have become rarer with each year of collection, we have Cornell drawers of specimens from surveys and every year they become less and less diverse. Some species are really much better at adjusting to new pesticides than others.