This study represents a segment of an extensive research program under the direction of Dr. Gordon H. Orians, of the University of Washington, on the ecology of Red-winged Blackbirds, Agelaius phoeniceus, and Yellow-headed Blackbirds, Xanthocephalus xanthocephalus, during their breeding season.
Author: Dan C. Holliman
Volume Number: 15 Year Published: 1967
Issue Number: 3-4
Page Number: 32
Link to article: http://birdlife.aosbirds.org/1967/Vol 15 No. 3, 4_1967_p33-36.pdf
Link to the full issue of BirdLife: http://birdlife.aosbirds.org/1967/Vol 15 No. 3, 4_1967.pdf