HOW BIRDS USE COWS AS HUNTING DOGS
A. L. Rand, 1953, Auk, 70, p. 26 (ani).
BATTLE OF THE SEXES AND ITS EVOLUTIONARY SIGNIFICANCE
A. L. Rand, 1952, Fieldiana-Zoology (Chicago), Vol. 34, p. 65.
WATER IN THE DESERT
C. T. Vorhies, 1945, Univ. Ariz. Agri. Exp. Sta. Tech. Bull. 107 (water need in desert). J. T. Emlen, Jr., and B. Blading, 1945, Univ. Calif. Coll. Agri. Bull. 695, p. 34 (valley quail). E. G. B. Meade-Waldo, 1922, Bull. Brit. Orn. Cl., Vol. 42, p. 69 (sand grouse).
BIRD GRAVEYARDS
R. C. Murphy, 1936, Oceanic Birds of South America, Vol. 1, p. 372 (penguins). U. M. Grigg, 1950, Brit. Birds, Vol. 43, pp. 11-13 (graveyard in hollow tree). G. Simmons, 1927, Nat. Geog. Mag., Vol. 52, p. 27 (petrel bones on Cima).
ANIMAL GARDENS
R. C. Murphy, 1936, Oceanic Birds of South America, Vol. 1, p. 374 (penguins). F. Harper, 1953, Amer. Midland Nat., Vol. 49, p. 6 (birds and lichens). H. W. Feilden, 1877, Zoologist, Vol. 1, p. 319 (arctic-fox gardens).