Daniel J. Field:
Lesser Yellow-headed Vulture (Cathartes burrovianus), Esteros del Iberá, Corrientes, Argentina
Daniel J. Field:
Lesser Yellow-headed Vulture (Cathartes burrovianus), Esteros del Iberá, Corrientes, Argentina
Daniel J. Field:
Turkey Vulture (Cathartes aura), Bodega Bay, California
Daniel J. Field:
Black Vulture (Coragyps atratus), Sterling Forest, New York
Daniel J. Field:
Black Vulture (Coragyps atratus), Islas Cocinas, Jalisco, Mexico