Probably the young of either Hypotriorchis columbarius or Accipiter fuscus, but quite impossible to identify from such a meagre description.
14. Falco glaucus. Bartram, Travels, p. 290. (1791.) Barton, Fragments of the Nat. Hist. of Penna., p. 11. (1799.)
“The sharp-winged hawk, of a pale sky-blue color, the top of the wings black.” (Bartram, as above.)
This insufficient description has been supposed to be intended for the adult of the Marsh Hawk (Circus hudsonius), but Barton (as above) applies it to the Nauclerus furcatus. It is probably one or the other.
15. Falco subceruleus. Bartram, Travels, p. 290. (1791.)
“The sharp-winged hawk, of a dark or dusky blue color.” (Bartram, as above.)
Impossible to identify, from its brevity. It may be either the Mississippi Kite (Ictinia mississippiensis), the Fork-tailed Hawk (Nauclerus furcatus), or the adult Marsh Hawk (Circus hudsonius).
16. The following names have been given without descriptions, by the authors cited:—
Falco regalis. The great Gray Eagle. Bartram, Trav., p. 290. Barton, Frag. Nat. Hist. Penna., p. 11. Falco gallinarius. The Hen Hawk. Bartr. Trav., p. 290. Falco pullarius. The Chicken Hawk. Bartr. Trav., p. 290. Falco ranivorus. The Marsh Hawk. Bartr. Trav., p. 290. Falco piscatorius. The Fishing Eagle. Bartram, Trav., p. 290. Barton, Frag. Nat. Hist. Penna., p. 2, 17. Falco cæsius. The Blue Hawk. Ord., Zool. N. A., in Guthrie’s Geog, I. p. 315.
The above embrace all the names and descriptions of birds of this family that have come under our notice, except those of such as are now well ascertained to inhabit other countries exclusively, and for which nearly allied species of North America have been mistaken. Of the latter we may more particularly mention the European Falco rusticolus (Linn.), which is given by Fabricius as a bird of Greenland, but stated by Holboll to have been the young of F. anatum, and Buteo vulgaris and Hypotriorchis æsalon, both of which are also European species, and have never been found in America to our knowledge, though there are species which are nearly related to them.