Actually, I haven't seen many bird-watchers in camo! They're kind of like wildlife photographers, mostly going to parks and other places where animals and birds are used to people, so are relatively tame.
They do spend a lot of money on binoculars, though, because like rifles for hunters, binoculars are their primary tool. About the only other thing they really need is a bird guide, and even the best one available for North America is less than $50.
