Further Data on Removal and Repopulation of the Breeding Birds in a Spruce-Fir Forest Community

Abstract

the writers were engaged in a study of bird populations in northern Maine in conjunction with investigations to determine the effectiveness o! the breeding bird population as a controlling agent of the spruce budworm. Chorisloneura fumiferana. The field work was started in 1949 and the current project was a continuation. The entomological phase of the study during both seasons was conducted under the supervisleu of Philip B. Dowden and V. M. Carolin of the Bureau of Entomobgy and Plant Quarantine; the initial bird population study was made oy John W. Aldrich and Robert E. Stewart of the Fish and Wildlife Service (See page 471 of this issue of 'The Auk'). Many data were accumulated concerning bird population dynamics during the initial study. To compare the res,Its of the two seasons and to present other significant facts, additional data are presented here.