The Birds of Newfoundland Labrador

Austin, Oliver L., Jr.

British Birds' Eggs & Nests

Atkinson, Rev. Canon

Catalogue of the Birds of the Americas and Adjacent Islands, Part I, Number 4. Birds of Prey

Hellmayr, Charles E; Conover, Boardman; Cory, Charles B.

Traite de Fauconnerie (French Treatise on Falconry)

SCHLEGEL, Hermann; VERSTER DE WULVERHORST, A.H.