RZ THE AU DUE ONE Uae 
effort should result in better work as well as better presentation for 
those who may wish to read of it during later years.” 
The fine results of “Codperative Ornithology” are summarized by 
McCabe (33b), who describes the “Report of Bird Migration in the 
Mississippi Valley’, and nesting and wild fowl censuses in this coun- 
try, and the “‘Census of British Heronries” and “Great Crested Grebe 
Inquiry” in Great Britain The Indiana Audubon Society organizes 
the efforts of banders in that state and has published reports on the 
migration of several Indiana-breeding birds (Perkins, 732; Test ’33). 
Fields in which codperation is especially called for are population 
and migration studies, studies on particular species, and keeping track 
of the literature. 
Under population studies a number of problems suggest them- 
selves: censuses; return of adults to breeding place; return of young 
to birth place; percentage of immature birds in the fall; percentage of 
first-year birds in the breeding population; success of nests; sex ratio; 
longevity, etc., etc. 
Under migration problems there are the questions of the winter 
quarters, the migration route, the migratory or stationary status of 
each population of breeding birds, the great and difficult questions of 
migration and weather, and many, many other subjects of importance. 
As to the study of species, could not people that are specializing on 
a particular bird club together to help each other, possibly one of them 
going to Washington to work up the data in the Hes of the Biological 
Survey, and then finally write a joint report? 
As to the means of working out this scheme of cooperative re- 
search, I would suggest a central committee composed of Mr. Lincoln, 
Mr. Whittle and representatives from the four regional bird-banding 
associations, with sub-committees each with a rather definite problem 
to solve. 
In conclusion, let me quote from McCabe’s (’383a) discussion of 
banding: “The most delightful of occupations, with a world of human 
and scientific good to its credit, its ultimate justification lies in its con- 
crete scientific value and nothing else.” 
We have a great opportunity and a definite responsibility. There 
is nothing in the world so wonderful as the discovery of truth. Let us 
plan our efforts so as to make the most of our opportunity. 
Bibliography 
Biological Abstracts. University of Pennsylvania, Philadelphia. 
Forbush, E. H. 1927. Some Problems for Bird Banders. Bull. 
Northeastern Bird-Banding Assn. 3 :33-35. 
Lincoln, F. C. and 8. P. Baldwin. 1929. Manual for Bird Banders. 
U. 8. Dept. Agriculture, Misc. Pub. 58. 112 p. 
McCabe, T. T. 1933a. Summary of Western Banding. News from 
the Bird-Banders, 8:15. 
———— 1933b. Codperative Ornithology. Ibid. 8:26-34. 
Nice, M. M. 1932. Measurements of White-throated and Other 
Sparrows to Determine Sex. Bird-Banding, 3:30-31. 
