a small brown-and-white European moth, Euproctis phaeorrhoea, naturalized in the eastern US where it causes damage to shade trees: family Lymantriidae (or Liparidae)
See also tussock moth
browntail moth in American English
(ˈbraʊnˌteɪl)
a white moth (Euproctis chrysorrhoea) whose larvae are harmful to trees and cause an irritating skin rash