The Collaborative International Dictionary
Falco aesalon
Merlin \Mer"lin\, n. [OE. merlion, F. ['e]merillon; cf. OHG. smirl, G. schmerl; prob. fr. L. merula blackbird. Cf. Merle.] (Zo["o]l.) A small European falcon ( Falco columbarius, syn. Falco lithofalco, or Falco [ae]salon). In North America called also pigeon hawk.