In recent years, several observers, including the author, have noted an apparent decline in the number of House Sparrows being found on Audubon Christmas Bird Counts and other bird censuses in Northwest Florida and coastal Alabama. In order to learn more about this phenomenon, I examined data published in the National Audubon Society Field Notes, (formerly American Birds) Christmas Bird Counts, published by the National Audubon Society, New York, for the five year period of 1980- 1984 and compared the results with the latest five year period, 1990 – 1994, by noting a percent increase or decrease.
Author: Robert A. Duncan
Volume Number: 42 Year Published: 1996
Issue Number: 2
Page Number: 1
Link to article: http://birdlife.aosbirds.org/1996/Vol 42 No. 2_1996_p1-2.pdf
Link to the full issue of BirdLife: http://birdlife.aosbirds.org/1996/Vol 42 No. 2_1996.pdf