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).