Tracking Irruptive Movements of Wintering Evening Grosbeaks (Coccothraustes vespertinus) from Western Pennsylvania David Yeany II, Avian Ecologist, Pennsylvania Natural Heritage Program, Western Pennsylvania Conservancy, dyeany@paconserve.org Lucas DeGroote, Avian Research Coordinator, Powdermill Nature Reserve, Carnegie Museum … Continue reading Wintering Evening Grosbeak Movements