My husband and I observed about 400 Broad-winged Hawks (Buteo Platypterus platypterus) on September 16, 1959. At 10 AM on this date we were driving north on U.S. 31, and had gone perhaps a mile beyond the town of Castleberry. Then we saw them on both sides of the road.
Author: Maxi Swindel
Volume Number: 7 Year Published: 1959
Issue Number: 3-4
Page Number: 24
Link to article: http://birdlife.aosbirds.org/1959/Vol 7 No.3, _1959_p24.pdf
Link to the full issue of BirdLife: http://birdlife.aosbirds.org/1959/Vol 7 No.3, _1959.pdf