fork-tailed

CIDE DICTIONARY

fork-tailed, a. 

 Having the outer tail feathers longer than the median ones; swallow-tailed; -- said of many birds.  [1913 Webster]

Fork-tailed flycatcher (Zoöl.), a tropical American flycatcher (Milvulus tyrannus). -- Fork-tailed gull (Zoöl.), a gull of the genus Xema, of two species, esp. X. Sabinii of the Arctic Ocean. -- Fork-tailed kite (Zoöl.), a graceful American kite (Elanoides forficatus); -- called also swallow-tailed kite.