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.
Usage examples of "fork-tailed".
From the top tray, she picked up a small ivory carving, a fork-tailed swallow dark yellow with years, and stroked her thumb along the curved wings.
What emerged into the blaze of sunlight was one of those fork-tailed sea dwellers such as the Terrans had seen die after the storm.
Listen, Lantee, when you jumped down to mix it with that fork-tailed thing, did you wish you had the wolverines with you?
A fork-tailed flycatcher, 5 inches of bird followed by 9 inches of tail, overflew us.
Gulls and a fork-tailed frigate bird sailed inquiringly about the plane.