NO. 7 FLOCKS OF NEOTROPICAL BIRDS — MOYNIHAN 1 39 



HlNDWOOD, K. A. 



1937. The flocking of birds with particular reference to the association of 

 small insectivorous birds. Emu, vol. 36, No. 4, pp. 254-261. 

 Hutchinson, G. E. 



1959. Homage to Santa Rosalia or why are there so many animals? Amer. 

 Nat., vol. 93, pp. 145-159. 

 Johnson, R. A. 



1954. The behavior of birds attending army ant raids on Barro Colorado 

 Island, Panama Canal Zone. Proc. Linn. Soc. New York, 1951- 

 1953, vol. 63-65, pp. 41-70. 

 Lack, D. 



1944. Ecological aspects of species formation in passerine birds. Ibis, 

 vol. 86, pp. 260-286. 



1947. Darwin's finches. Cambridge. 



1954. The natural regulation of animal numbers. Oxford. 

 Mayb, E. 



1931. Birds collected during the Whitney South Sea Expedition. XIV. 

 Amer. Mus. Nov. No. 488, pp. 1-11. 

 Mitchell, M. H. 



l 9S7- Observations on birds of southeastern Brazil. Toronto. 

 Moreau, R. E. 



1948. Ecological isolation in a rich tropical avifauna. Journ. Anim. Ecol., 



vol. 17, pp. 1 13-126. 

 Moynihan, M. 



i960. Some adaptations which help to promote gregariousness. Proc. 12th 

 Internat. Ornithol. Congr., pp. 523-541. 

 Odum, E. P. 



1942. Annual cycle of the black-capped chickadee — 3. Auk, vol. 59, pp. 499- 



53L 

 Pinto, O. M. de O. 



1944. Catalogo das aves do Brazil. Pt. 2. Publ. Dept. Zool. Sec. Agr. Ind. 



Com. Brasil, pp. 1-700. 

 Rand, A. L. 



1936. The distribution and habits of Madagascar birds. Bull. Amer. Mus. 



Nat. Hist., vol. 72, pp. 143-499. 

 1954. Social feeding behavior of birds. Fieldiana: Zoology, vol. 36, 

 pp. 1-71. 

 Skutch, A. F. 



1954. Life histories of Central American birds, families Fringillidae to 

 Coerebidae. Pacific Coast Avifauna, vol. 31. 

 Slud, P. 



i960. The birds of finca "La Selva" Costa Rica: a tropical wet forest 

 locality. Bull. Amer. Mus. Nat. Hist, vol. 121, pp. 53-148. 

 Snow, D. 



1954. The habitats of Eurasian tits (Parns spp.). Ibis, vol. 96, pp. 565- 

 585. 

 Stanford, J. K. 



1947. Bird parties in forest in Burma. Ibis, vol. 89, pp. 507-509. 



