New York Natural Heritage Program
Northern Harrier
Circus cyaneus (Linnaeus, 1766)

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Loucks, Barbara Allen. 1992. Critical habitat components for the northern harrier (Circus cyaneus) in New York State. Draft Manuscript. 15 pp.
MacWhirter, R.B., and K.L. Bildstein. 1996. Northern Harrier (Circus cyaneus). In A. Poole and F. Gill, editors, The Birds of North America, No. 210. Academy of Natural Sciences, Philadelphia, and American Ornithologists' Union, Washington, DC. 32 pp.
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Information for this guide was last updated on: 07-Aug-2017