Pine Grosbeak (Pinicola enucleator)
Flight Call: A series of 2-3 soft whistles, somewhat reminiscent of the flight call of Greater Yellowlegs. This is typical of the eastern form of Pine Grosbeak, with birds in the west having distinctly different flight calls (Adkisson 1999).
Pine Grosbeak flight call, December 29, 2010, Sister Bay, Door County, Wisconsin.
Adkisson, Curtis S. 1999. Pine Grosbeak (Pinicola enucleator), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/456 doi:10.2173/bna.456