 Bumblebees , despite their ability to sting , are eaten by certain predators . Nests may be dug up by badgers and eaten whole , including any adults present . Adults are preyed upon by robber flies and beewolves in North America . In Europe , birds including bee @-@ eaters and shrikes capture adult bumblebees on the wing ; smaller birds such as great tits also occasionally learn to take bumblebees , while camouflaged crab spiders catch them as they visit flowers . 
