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Measurements
Size differs among the 3 subspecies (Amadon 1975). Linear measurements and body mass for 3 subspecies of Snail Kite are presented in Appendix .
Sykes, Jr., P. W., J. A. Rodgers, Jr. and R. E. Bennetts. 1995. Snail Kite (Rostrhamus sociabilis), 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/171