Long-term population trends in songbirds: Evidence from a general netting program
Abstract
A one-day-a-week general bird-netting operation has been conducted each autumn since 1965 at the UWM Field Station. Overall results for 23 years are presented, on a species by species basis. The 101 species captured were divided into three groups for a linear regression test for long-term population trends. Permanent residents showed no change over the 23 years. Short distance migrants exhibited a slight but not statistically significant decline. Long-distance migrants, on the other hand, exhibited a statistically significant decline, lending support to other studies which have reported population declines in North American songbirds that spend the winter in the tropics.
Subject
songbirds
population trends
migratory birds
Permanent Link
http://digital.library.wisc.edu/1793/90301Type
article
Citation
Weise, C.M. 1988. Long-term population trends in songbirds: Evidence from a general netting program. Field Station Bulletin 21(1): 1-9.