The wing and tail measurements of two Swallow-tailed Kites collected in Alabama conform with those of Elanoides forficatus yetapa (Vieillot), the South American Swallow-tailed Kite, rather than with the prescribed race, Elanoides forficatus forficatus (Linnaeus), the North American Swallow-tailed Kite.
Author: Robert W. Skinner
Volume Number: 12 Year Published: 1964
Issue Number: 3-4
Page Number: 42
Link to article: http://birdlife.aosbirds.org/1964/Vol 12 No. 3, 4_1964_p42.pdf
Link to the full issue of BirdLife: http://birdlife.aosbirds.org/1964/Vol 12 No. 3, 4_1964.pdf