From April to September, 1945, and April to June, 1946, data were gathered on the breeding behavior of the black-headed grosbeak (Pheucticus melanocephalus) in Strawberry Canyon, on the campus of the University of California at Berkeley, California. Particular attention was given to the role of the sexes at the nest (Weston, 1947). Data were also gathered on variations of songs of the male during the breeding season.
Proceedings of the Iowa Academy of Science
©1955 Iowa Academy of Science, Inc.
Weston, Henry G. Jr.
"Variation in Length of Songs of the Black-headed Grosbeak During the Breeding Season,"
Proceedings of the Iowa Academy of Science, 62(1), 618-625.
Available at: https://scholarworks.uni.edu/pias/vol62/iss1/76