The Collaborative International Dictionary of English v.0.48:

Lanner \Lan"ner\, n. f. Lanneret \Lan"ner*et\, n. m.[F. lanier,
   OF. also, lasnier. Cf. Lanyard.] (Zool.)
   A long-tailed falcon (Falco lanarius), of Southern Europe,
   Asia, and Northern Africa, resembling the American prairie
   falcon.
   [1913 Webster]