Subspecies of bird
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The Tres Marias red-tailed hawk (Buteo jamaicensis fumosus) is a relatively small subspecies of red-tailed hawk endemic to Islas Marías, an island some off the coast of Mexico. Unlike some other island races, the validity of this race has rarely been called into question. The wing chord of males can range from , averaging , and, in females, it ranges from , averaging . Males and females average in tail length, in tarsal length and in culmen length. This race is similar to the western red-tailed hawk ("B. j. calurus") but, beyond being noticeably smaller, is duskier and duller hued overall and has a more cinnamon wash below, with heavily dark barred thighs.
References.
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