The Collaborative International Dictionary
Fork-tailed \Fork"-tailed`\, a. (Zo["o]l.) Having the outer tail feathers longer than the median ones; swallow-tailed; -- said of many birds.
Fork-tailed flycatcher (Zo["o]l.), a tropical American flycatcher ( Milvulus tyrannus).
Fork-tailed gull (Zo["o]l.), a gull of the genus Xema, of two species, esp. X. Sabinii of the Arctic Ocean.
Fork-tailed kite (Zo["o]l.), a graceful American kite ( Elanoides forficatus); -- called also swallow-tailed kite.
WordNet
n. graceful North American black-and-white kite [syn: swallow-tailed hawk, Elanoides forficatus]
Wikipedia
The swallow-tailed kite (Elanoides forficatus) is an elanid kite which breeds from the southeastern United States to eastern Peru and northern Argentina. Most North and Central American breeders winter in South America where the species is resident year round. It was formerly named Falco forficatus.