BIBLIOGRAPHY OF ECONOMIC RELATIONS OF BIRDS 157 
Notes on damage done by the yellow headed blackbird by 
devouring grain, both in planting and harvesting seasons. 
Also notes on distribution and habits of red-winged blackbird, 
purple grackle, Brewer’s blackbird, cow bird, bobolink, and 
Franklin’s gull. 
1888. Fisher, A. K. Food of Hawks and Owls. U. S. De- 
partment of Agriculture, Annual Report, 1887, pp. 
402-422. 
Statements of the stomach contents of more than 1,000 
hawks and owls. The following species are mentioned: 
Swallow-tailed kite, Mississippi kite, marsh hawk, sharp- 
shinned hawk, Cooper’s hawk, goshawk, red-tailed hawk, 
red-sliouldered liawk, Swainson’s hawk, broad-winged hawk, 
rough-legged hawk, golden eagle, bald eagle, prairie falcon, 
duck hawk, pigeon hawk, sparrow hawk, barn owl, long- 
eared owl, short-eared owl, barred owl, Florida barred owl, 
sawwliet owl, screech owl, great horned owl, snowy owl, 
hawk owl, and burrowing owl. Only a few of these species 
were found to be injurious. 
1888. Fisher, A. K. Experiments in Poisoning. U. S. De- 
partment of Agriculture, Annual Report, 1887, pp. 
423-426. 
Details of experiments with strychnine and arsenic in va- 
rious forms and corrosive sublimate as poisons for birds. 
1888. Warren, B. H. Report on the Birds of Pennsylvania, 
with special reference to food habits. Harrisburg, 
1888, pp. I-XIT, 1-260. 
An elaborate report based on the examination of over three 
thousand stomachs. Illustrated with fifty plates. A revised 
and enlarged edition covering 450 pages was published in 
1890. The notes on food materials are unusually complete. 
1889. Baker, C. F. Notes on the Food of Birds. Proceed- 
ings Academy of Natural Sciences of Philadelphia, pp. 
266-270. 
9 
Upwards of 300 stomachs examined in Florida. 
1889. Barrows, W. B. The Rose-breasted Grosbeak. I . S. 
Department of Agriculture, Report, 1888, pp. 535, 536. 
