CATALOGUE OF CANADIAN BIRDS. 261 
at Lake Okanagan all winter. (Brooks.) Our specimens from 
Medicine Hat, Assa., from the 4gth parallel between Trail and 
Cascade, B.C., and those taken at Huntington in the Fraser River 
valley are of this subspecies. (Vacoun.) 
MUSEUM SPECIMENS. 
Six ; three taken at Medicine Hat, Assa., two at Cascade, B.C., 
on the goth parallel, and one at Huntington in the Fraser River 
valley on the goth parallel, all collected by Mr. Spreadborough. 
CXXIX. POLYBORUS VIEILLoT. 1816. 
362. Audubon’s Caracara. 
Polyborus cheriway (Jacg.) Cas. 1848. 
The occurrence of this species on the north shore of Lake 
Superior, not far from Port Arthur, on July 18th, 1892, is reported 
by Mr. George E. Atkinson, to the Natural History Society of 
Ontario. (Wiliam Brewster in The Auk, Vol. X, 364.) 
CXXX. PANDION Savieny. 
364. American Osprey. 
Pandion halaétus carolinensis (GMEL.) RipGw. 1870. 
A single specimen was obtained at Godhavn, Greenland, by 
Mr. E. Whymper and sent to the Museum at Copenhagen. (Avc- 
tic Manual.) 
This species is a common summer resident and generally dis- 
tributed along rivers or the borders of lakes, in Newfoundland, 
Nova Scotia, Prince Edward Island, New Brunswick, Quebec and 
throughout Ontario. Westward it is found under the same con- 
ditions throughout the prairie regions and the mountains to the 
Pacific coast. Northward it is found in all the forest country and 
beyond the Arctic Circle in the valley of the Mackenzie. In 
Alaska, Nelson places its breeding range beyond the Arctic 
Circle so that it breeds almost throughout its range. 
BREEDING Notes.—About the beginning of May the osprey 
commences to build. Its nest is built near the top of a tall tree 
and is apparently occupied year after year by the same birds. 
Fach year a fresh layer of dry sticks is laid on top of the old nest 
and it soon becomes a very bulky structure. The female lays 
