VULTURES. Cathartidæ:—Head bare; feet hen-like.
HAWKS, EAGLES. Falconidæ:—Bill and claws strongly hooked; nostrils in a cere at base of bill.
BARN OWLS. Aluconidæ:—Black eyes in triangular facial disc; middle toe-nail serrated.
HORNED OWLS, ETC. Bubonidæ:—Facial disc round; some species with ears, others without.
BIRD GUIDE
PART 1
Water Birds, Game Birds and Birds of Prey
