Explanation of Names
Byrrhidae Latreille 1804
common name: when disturbed, beetle retracts appendages into ventral recesses, forming a compact "pill"
Numbers
35 spp. in 15 genera north of Mexico
(1)(2), 430 spp. in ~40 genera worldwide
(3)
Overview of our faunaFamily BYRRHIDAE
Range
most of Canada and n. half of the US; mostly boreal and montane, most NA taxa are restricted to the west
(1)(6); also Eurasia and the tropics
Habitat
sandy shorelines, beneath logs and stones, among grass roots, and mossy habitats in general
Season
adults fly during spring and early summer
Food
most feed on moss; occasionally on liverworts, lichens, and grass roots
Remarks
Most adults are active at night or in dim light; Morychus and Cytilus may be active in open areas on sunny days
See Also
members of other families may look similar