NE OD FOr Cale Ik Ome XXXV
17. Fatco cANDICANS : : : : : : i : é : o> 2) Volel BE XT:

GREENLAND Fatcon.

This species inhabits the icy regions of Greenland, Hudson’s Bay, and other parts of Arctic America, and
is less frequently seen in the British Islands in the adult state than the F. tslandus, from which it is distin-

guished by the extreme whiteness of its plumage, and by the young being lightly coloured from the nest.

18, Fatco canpicans ; : : : ; é : : : : : - Vol, I. BR oxivz
GreenLanp Farcon (dark race).

My plate represents a supposed dark race of the preceding species ; but as the strongly defined marks on
the back vary considerably in different individuals, and the tail-feathers differ still more so, some being
wholly white, others barred, and others, again, having irregular dark markings, I am induced to regard these
darkly marked birds as the result of a cross between I’, islandus and F. candicans. The young appear
to be lightly coloured from the nest ; but a considerable difference takes place at the first moult, when the
feathers of the back are ornamented with long and broad blotches, offering a strong contrast to the narrow
lunate cross markings of the old bird. I have been induced to give two figures of these unusually marked

birds.

19. Fatco canpicaNns ; : ; : : : : : : : : : Vol. Bieexwe

GREENLAND Farcon (dark race, young).

Lord Cawdor’s bird, now in the British Museum, from which my figure of the Gyr Falcon in the ‘ Birds
of Europe,’ and Mr. Yarrell’s in his ‘ British Birds,’ were taken, is a young specimen of this race ; and it is

in this stage that most of the individuals are found with us.

20. Fatco e@yrFaLco : : ‘ : : ; : : , : ! : Vol. I. RIP Xue
Norwegian or Gyr Faucon.

The true Gyr Falcon of Norway, Sweden, Finland, and Western Russia is a smaller bird than the three
preceding ; and both the adult and young are darker in colour. As yet, it has not been found in the British
Islands, although its native country is so near at hand. The plate has been given to show the differences
which exist among these northern Falcons, to which Professor Kaup has applied the separate generic

appellation of Merofalco.