Iceland or Jer Falcon, Falco Islandicus, Aud. Orn. Biog. v. ii. p. 552. Young Male and Female. 20. 2. Falco peregrinus, Gmel. Peregrine Falcon.--Large-footed Hawk. Duck Hawk. Wandering Falcon. Plate XVI. Adult Male and Female. Wings, when closed, of nearly the same length as the tail. Adult male with the upper parts greyish-black, excepting the head and hind neck barred with light greyish-blue, lower parts white, the breast and sides transversely spotted with black. Female with the upper parts darker than those of the male, the lower yellowish or reddish-white, with larger dusky spots on the breast and sides, and oblong streaks on the neck. Young blackish-brown above, the breast of the male yellowish-white, of the female pale yellowish-red, with broad longitudinal dusky streaks. In all stages, a large mystachial patch, black in adult, brown in young birds. _Male_, 16-1/2, 30. _Female_, 19-1/2, 36. Breeds in the northern parts, visiting the southern and western in winter as far as Texas. Great-footed Hawk, Wils. Amer. Orn. v. ix. p. 120. Falco peregrinus, Bonap. Synops. p. 27. Common or Wandering Falcon, Falco peregrinus, Nuttall, Man. v. i. p. 53. Great-footed Hawk, Falco peregrinus, Aud. Amer. Orn. v. i. p. 85; v. v. p. 365. Falco peregrinus, Peregrine Falcon, Swains. & Rich. F. Bor. Amer. v. ii. p. 23. 21. 3. Falco columbarius, Linn. Pigeon Falcon.--Pigeon Hawk. Plate LXXV. Young Male and Female. Plate XCII. Adult Male. Wings from two to three inches shorter than the tail, on the middle feathers of which are five, on the lateral six broad whitish bands. Adult male with the cere greenish-yellow, the feet pale orange, the upper parts light bluish-grey, each feather with a black central line; lower parts reddish or yellowish white, the breast and sides with large oblong brown spots; tibial feathers light red, streaked with blackish-brown. Female with the cere and legs greenish-yellow, the upper parts dark greyish-brown, the lower pale red, spotted as in the male. Young with the head light reddish-brown, streaked with dusky, the upper parts brownish-grey, the feathers margined and spotted with pale red, throat white, lower parts pale red, streaked with brown. The tail-bands vary from pale red to white. This species is so nearly allied to _Falco Æsalon_, that it is extremely difficult to distinguish many individuals. The number and form of the scutella differ; but the most certain distinctive character is found in the light-coloured bands of the tail, which are more numerous in the Merlin, there being seven on its middle, and nine on its lateral tail-feathers. _Male_, 10-3/4, 27. _Female_, 14, 30. From Texas northward. Breeds in the Labrador and Arctic regions. Abundant. Migratory. Pigeon Hawk, Falco columbarius, Wils. Amer. Orn. v. ii. p. 107. Falco columbarius, Bonap. Syn. p. 38. Pigeon Hawk, Falco columbarius, Nutt. Man. v. i. p. 60.