Canadian Forest Service Publications
A long-term bird census in spruce budworm-prone balsam fir habitats in northwestern New Brunswick. 1978. Gage, S.H.; Miller, C.A. Fisheries and Environment Canada, Canadian Forest Service, Maritimes Forest Research Centre, Fredericton, NB. Information Report M-X-84. 6 p.
Issued by: Atlantic Forestry Centre
Catalog ID: 7707
Availability: PDF (download)
A long-term bird census was conducted in five plots located in largely balsam fir stands of northwestern New Brunswick. During part of the 22-year census, two of the plots were heavily infested with spruce budworm Choristoneura fumiferana (Clem.), and suffered extensive tree mortality. Nineteen bird species were common to all plots; differences in their densities, relative to forest cover and presence of budworm as a food supply, are presented.