Part 21

F. G. Evenden, 1943, Condor, 45, p. 120 (dipper). For divers records of washing food see British Birds for 1946, 6 and 8.

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).

DROPPING THINGS

M. E. W. North, 1948, Ibis, p. 138-41 (lammergeier). E. Jaeger, 1951, Condor, 53, p. 207 (sparrow).

LEARNING BY BIRDS

A. L. Rand, 1941, Bull. Amer. Mus. Nat. Hist., Vol. 78, p. 222 (thrasher). A. L. Rand, 1942, Bull. Amer. Mus. Nat. Hist., Vol. 79, p. 518 (blue jay).

CAN BIRDS COUNT?

Bird-banding, 1940, Vol. 11, p. 121 (summary various experiments).

COURTSHIP FEEDING

D. Lack, 1940, Auk, Vol. 57, p. 169 (courtship feeding).

THEY TURNED THE TABLES

A. C. Bent, 1926, U. S. Natl. Mus. Bull. 135, p. 109 (great blue heron). W. P. Baldwin, 1946, Auk, Vol. 63, p. 589 (oyster catcher). G. Mackay, 1929, Auk, 46, p. 123 (goldfinch). D. Bannerman, 1936, Birds Tropical West Africa, Vol. 4, p. 244 (dusky flycatcher).

SURVIVAL OF THE UNFIT

A. W. Anthony, 1898, Auk, Vol. 15, p. 314 (frigate bird). J. Cassin, 1858, United States exploring expedition ..., Mammals and Birds, Philadelphia, p. 364 (brown booby).

DECORATION IN THE HOME

A. C. Bent, 1937, U. S. Nat. Mus. Bull. 167, p. 151 (red-tailed hawk), p. 296 (golden eagle). M. R. Lieff and N. P. Jordan, 1950, British Birds, Vol. 43, p. 56 (carrion crow). E. H. Forbush, 1929, Birds of Mass., etc., Vol. 3, p. 141 (purple martin). A. L. Rand, 1936, Bull. Amer. Mus. Nat. Hist., Vol. 72, pp. 487, 490 (weaverbird).

INDEX

adaptation, 31 Aeschylus, death of, 186 Aeschylus on vultures, 172 ani, feeding rates of, 168 anointing feathers, 25 anting, 27 anvil, thrush's, 15 apartment houses, 77 Arctic fox and snowy owl, 49 association of: burrowing owl, prairie dog, snake, 73 lizard, petrel, 75 parrot, duck, opossum, 75 social weaver, falcon, 74

baby sitters, 35 bad and good birds, 152 bathing in dust, 204 bathing in snow, 204 bathing in water, 22, 205 beehives, guiding to, 125 beeswax as bird food, 125 bird of paradise, 162 boat names, 84 booming of nighthawk, 135 bower, painting of, 16 brigands, birds as, 19 brush turkey, 54 bucket drawing by jay, 190 buried eggs, 45 buried young, 45