¿Is there any repository of cascades?

edit

no, there isnt.

also, given, that bees in a real image may have any of 360° pose orientation, using cascades for this this seems to be a bad idea.

(not every detection problem in this world can be solved, using haar cascades)

(unless you rotate the image in small steps, and try a detection on each, but again, you'd have to sort your results in some way, which is terribly hard)