An oil spray of DDT was applied at the rate of five pounds per acre to a 90-acre tract of 5-year-old scrub and sapling growth at Beltsville, Maryland. Bird population studies were carried on in a 30-acre plot at the center of the sprayed area, and in a 30-acre check area of the same habitat one-half mile away. Of the five commonest species in the sprayed area, the Maryland yellowthroat, prairie warbler, and house wren were reduced 80 per cent, and the red-eyed towhee was apparently reduced 35 per cent; while no appreciable change in the numbers of yellow-breasted chats was noted. The total decrease for the five commonest species, which represented 77 per cent of the original population, was 65 per cent.
|Title||Effects of DDT on bird population of scrub forest|
|Authors||C.S. Robbins, R. E. Stewart|
|Publication Subtype||Journal Article|
|Series Title||Journal of Wildlife Management|
|Record Source||USGS Publications Warehouse|
|USGS Organization||Patuxent Wildlife Research Center|