Part 20

A. H. Miller, 1946, Sci. Monthly, Vol. 62, p. 238 (social parasites).

FISH EATS BIRD!

W. E. Glegg, 1945, Ibis, p. 422 (fish eating birds).

CROWS ARE SMARTER THAN "WISE" OWLS

A. L. Rand, 1943, Canad. Field Nat., Vol. 57, p. 35 (saw-whet owl). A. L. Rand, 1942, Bull. Amer. Mus. Nat. Hist., 79, p. 518 (blue jay). A. C. Bent, 1946, U. S. Natl. Mus. Bull. 191, p. 196 (raven), p. 266 (crow).

TAME WILD BIRDS

D. Lack, 1942, Ibis, p. 271 (flycatcher). A. H. Chisholm, 1943, Ibis, p. 105 (honey eaters). H. H. Brimley, 1934, Auk, 51, p. 237 (phoebe).

BIRDS AS PILFERERS

A. L. Rand, 1954, Fieldiana-Zoology, Vol. 36, p. 31 (pilfering, several species).

HIBERNATION IN BIRDS

W. L. McAtee, 1947, Amer. Midland. Nat., 38, p. 191 (old records on torpidity). E. C. Jaeger, 1949, Condor, 51, p. 105 (poor-will).

SNAKESKINS IN BIRDS' NESTS

A. L. Rand, 1953, Nat. Hist. Miscl. (Chicago), No. 125 (snakeskins in nests).

CO-OPERATION BY BIRDS

A. L. Rand, 1954, Fieldiana-Zool. (Chicago), Vol. 36, pp. 10, 12 (co-operation, various species).

WATCHDOGS AT THE NEST

R. E. Moreau, 1942, Ibis, p. 240 (in Africa). D. R. Dickey and A. J. van Rossem, 1938, Publ. Field Mus. Nat. Hist., Zool. Ser., Vol. 23, p. 360 (in El Salvador).

BIRD GUIDES TO HONEY

H. Friedmann, 1954, Nat. Geog. Mag., Vol. 105, p. 551 (honey-guides).

OXPECKERS

D. Bannerman, 1948, Birds of Tropical West Africa, Vol. 6, p. 105 (oxpecker).

WINGS IN FEEDING

J. Delacour, 1946, Auk, Vol. 63, p. 441 (black heron).

CONDITIONING IN BIRDS

A. L. Rand, 1942, Bull. Amer. Mus. Nat. Hist., Vol. 79, p. 517 (shrikes).

POISONOUS BIRDS

E. H. Forbush, 1927, Birds of Mass., etc., Vol. 2, p. 34 (ruffed grouse). D. L. Serventy and H. M. Whittell, 1948, Birds of Western Australia, pp. 73, 74 (Australian pigeons). R. Meinertzhagen, 1912, Ibis, p. 96 (Mauritius pigeon).

BIRDS WASHING FOOD