High Elevation Spruce-Fir

BlackpollBlackpoll Warbler

BITHBicknell’s Thrush

Potential threats to montane bird species on the breeding grounds include global warming, atmospheric deposition, and development. Habitat loss on the wintering grounds has been a serious conservation concern for Bicknell’s Thrush, but it is not known whether Blackpoll populations face substantial anthropogenic threats during migration or winter.