Robert Royse/ BIA / Blue-grey Gnatcatcher (Polioptila caerulea) calling, Ohio

Robert Royse / Bobolink (Dolichonyx oryzivorus), Ohio

Robert Royse / Bobolink (Dolichonyx oryzivorus), Ohio

Robert Royse / Winter Wren (Troglodytes hiemalis) calling, Ontario, Canada

Robert Royse / Golden-winged Warbler (Vermivora chrysoptera) male, Michigan

Robert Royse / Wilson's Warbler (Cardellina pusilla) male, Ontario, Canada

Robert Royse / California Thrasher (Toxostoma redivivum), California

Robert Royse / Cactus Wren (Campylorhynchus brunneicapillus), Arizona

Robert Royse / Grasshopper Sparrow (Ammodramus savannarum), Ohio

Robert Royse / Mountain Chickadee (Poecile gambeli), New Mexico

Robert Royse / Western Bluebird (Sialia mexicana) female, New Mexico

Robert Royse / Townsend's Solitaire (Myadestes townsendi), New Mexico