Numbers
89 spp. in 23 genera north of Mexico
(1)Habitat
many are common on flowers and trees, some live under bark or in mammal/bird nests
(1)Remarks
Some sp. are used as biocontrol agents. Some may be a nuisance: they are known for their irritating bites, mostly after landing on one's naked arm or neck.
Internet References
Anthocorids as nuisance (Iowa State University)