Part 19

R. E. Moreau, 1937, Proc. Zool. Soc. London, 1937, p. 331 (hornbills).

BURIED EGGS AND YOUNG

A. Newton, 1893, Dictionary of Birds, p. 733; and D. Bannerman, 1931, Birds Trop. West Africa, Vol. II, p. 205 (crocodile bird). Deusing, 1939, Auk, Vol. 56, p. 367 (grebe). Bent, 1925, U. S. Natl. Mus. Bull., 130, p. 98 (eider duck).

THE SNOWY OWL AS A TRADE INDEX

A. Gavin, 1947, Wilson Bull., Vol. 59, p. 202 (snowy owl).

MONKEY BIRDS

A. L. Rand, 1954, Fieldiana-Zoology (Chicago), Vol. 36, p. 23 (various "monkey-birds").

BIRD-MADE INCUBATORS

C. G. Sibley, 1946, Condor, Vol. 48, p. 92; Coles, 1937, Proc. Zool. Soc. London, 1937, pp. 261-73; Fleay, 1937, Emu, Vol. 36, pp. 153-63 (mound builders).

CORMORANT FISHING

B. Laufer, 1931, Publ. Field Mus. Nat. Hist. (Anthr. Ser.), 18, pp. 201-62; Gudger, 1926, Amer. Nat., 60, p. 5 (cormorant fishing).

THE SHRIKE'S LARDER

A. C. Bent, 1950, U. S. Natl. Mus. Bull. 197, p. 120 (shrike's larder).

BIRD FLAVORS

H. B. Cott, 1946, Proc. Zool. Soc. London, Vol. 116, pp. 371-524 (bird flavors).

HOW MANY FEATHERS HAS A BIRD?

A. Wetmore, 1936, Auk, Vol. 53, p. 159; F. B. Hutt and L. Ball, 1938, Auk, 55, p. 651 (number of feathers).

LAST YEAR'S BIRDS' NESTS

A. C. Bent, 1925, U. S. Natl. Mus. Bull. 130, pp. 91, 92; H. F. Lewis, 1938, Bird-Lore, Vol. 40, p. 239 (eider down).

SYMBIOSIS--ANIMALS LIVING IN MIXED HOUSEHOLDS

A. C. Bent, 1938, U. S. Natl. Mus. Bull. 170, pp. 384-86, 398 (burrowing owl). H. Friedmann, 1930, Natural History, Vol. 30, p. 205 (social weaver). W. H. Hudson, 1920, Birds of La Plata, Vol. 2, p. 31 (monk parrot). W. R. B. Oliver, 1930, New Zealand Birds, p. 118 (Sphenodon).

BIRD APARTMENT HOUSES

A. C. Bent, 1942, U. S. Natl. Mus. Bull. 179, p. 490 (purple martin). A. Wetmore and F. C. Lincoln, 1933, Proc. U. S. Nat. Mus., Vol. 82, art. 25, p. 44 (West Indian woodpecker). D. Bannerman, 1933, Birds of Tropical West Africa, Vol. 3, p. 381 (barbets). J. T. Emlen, 1954, Auk, Vol. 71, p. 16 (cliff swallows). W. H. Hudson, 1920, Birds of La Plata, Vol. 2, p. 31 (monk parrot). A. Wetmore and B. H. Swales, U. S. Natl. Mus. Bull. 155, p. 346 (palm chat); H. Friedmann, 1930, Nat. Hist., Vol. 30, p. 205 (social weaver).

BIRD HELPERS AT NESTING TIME

A. Skutch, 1935, Auk, 52, p. 257 (helpers at nest). M. M. Nice, 1943, Trans. Linn. Soc., Vol. 6, p. 79 (young feeding young). R. C. Murphy, 1936, Oceanic Birds of South America, Vol. 1, p. 360 (emperor penguins).

WEAVERS AND TAILORS IN THE BIRD WORLD

H. Friedmann, 1922, Zoologica, Vol. 2, p. 355 (weaverbird). C. A. Wood, 1926, Smithsonian Rept., p. 349 (tailorbird).

SOCIAL PARASITES AMONG BIRDS