OKLAHOMA ACADEMY OF SCIENCE 65 



from seven weeks till four months ; employed the alarm cry much 

 more frequently when to coo when six months old. 



3. D's. neck feathers showed iridescence for the first time 

 when he was five months old ; at 5 1-2 months be began to "whistle" 

 with his wings and two weeks later he cooed. 



4. The birds gained regularly from 7.8 to 9.7 per cent of their 

 weight each day and lost it again during the night. 



5. Each bird ate an average 11. 8g. of weed seeds and grain a 

 day, and 14.6g. of bread and milk, seeds and grain a day. These 

 amounted to 11.8 and 14.7 per cent of their body weightts. 



REFERENCES. 



Beal, F. E. L. 1904. Some Common Birds in their Relation to 

 Agriculture. Farm Bull. 54 p. 7; 48p. 



Craig, W. 1909. Expression of Emotion in Pigeons. I. The 

 Blend Ring-Dove. Jour. Comp. Neur. and Psych. XIX, p. 34, p. 60, 

 pp. 30-75. 



Craig, W. 1911. Expression of Emotion of Pigeons. II. The 

 Mourning Dove. Auk, XXVII. pp. 400-3. pp. 398-407. 



Eaton, E. H. 1909. Birds of New York. I. N. Y. State Mus. 

 p. 388. 501 p. 



Judd, S. D. 1900. The Food of Nestling Birds. Yearbook of 

 U. S. Dept. of Agri. p. 431 pp. 411-36. 



Nice, M. M. 1910. Food of the Bdbwhite. Jour. Econ. Ento- 

 mology, ir. pp. 310-11. pp. 295-313. 



Nice, M. M. 1911. Loti, the Tale of a Bobwhite. Suburban 

 Life Jxily pp. 21, 40, and 41. 



Ta:'lor, W. S. 1916. The Mourning Dove. Bull. Uni. Tex., p. 

 7. 19p. 



Townsend, C. W. 1906. Note on the Crop Contents of a Nest- 

 ling Mourning Dove. Auk, XXIII. p. 336. 



SOME UNEXPECTED FINDINGS IN THE 



STOMACH OF PREDATORY BIRDS 



AND MAMMALS 



Ed Crabb, 1920. 



The sttomach of three screech owls (Otus asio asio Linnaeus) 

 collected during January, contained a great number of insects, 

 chiefly grasshoppers (locusts) and beetles. In addition one had 

 eaten a large white grub which was probably the larva of the 



