The following is a small selection of publications that I consider to be the finest examples of the portrayal of birds.
Busby, John Drawing Birds (A&C Black/RSPB, 2004)
Busby, John (ed.) The Living Birds of Eric Ennion (Victor Gollancz, 1982)
Gillmor, Robert C.F. Tunnicliffe RA: Sketches of Birdlife (Victor Gollancz, 1981)
Hill, Martha The Peerless Eye – the art of Bruno Liljefors (The Allen Publishing Co Ltd, 1987)
Jonsson, Lars Bird Island (Croom Helm, 1986)