text: does the state of colorado have alot of insects and what or the main ones?   no - that's one of the great things about living here!  the main ones i've experienced are spiders and ants.  the ants are usually small and outdoors, and the spiders are mostly non-threatening.  there can occasionally be buildups of poisonous black widows - but almost always outside in woodpiles and similar locations.   there are some plain black flies in late summer, and miller moths come through on their migration for a couple of weeks in early summer, and of course there are other bugs - but really minor compared to a lot of other places.