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 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