68 BULLETIN 17 0, UNITED STATES NATIONAL MUSEUM 



The range, as now revised in the A. O. U. Check-List (1931), is 

 approximately correct. Maj. Allan Brooks (1926), who has made a 

 study of this group, gives the range of pealei, as follows: "The North 

 Pacific islands between latitude 50 and 55, from the Skeena River 

 mouth (British Columbia) to the Commander Islands (and adjacent 

 coast of Kamchatka?). Probably resident throughout its range." 



He gives the following characters of the race: 



It is characterized by a very heavily marked under surface in the adult and 

 possibly greater size than in Falco peregrinus peregrinus and F. peregrinus anatum. 

 The markings in the adult female extend up onto the jugulum in the form of tear 

 drops and bars, not hair lines or narrow lanceolations as in other forms of pere- 

 grinus. In the adult male the markings are not so pronounced, but the whole 

 lower surface is usually dusted with dark gray in addition to the bars. There is 

 very little rufous on the lower surface in either sex. The young are very dark 

 and may or may not have rufous edgings to the feathers of the mantle; they can 

 be matched almost exactly by dark juveniles from the Atlantic coast. 



Adults from the Queen Charlotte Islands that I have examined 

 have the upper parts "fuscous" to "hair brown"; the under parts 

 are white, slightly tinged with "cinnamon-buff" on the belly, heavily 

 spotted on the upper breast, and heavily spotted and barred on the 

 belly and flanks with black; the black bars on the flanks are as wide 

 as the white spaces, and nearly so on the tibiae; the dark bars on the 

 tail and its upper coverts are wider than the gray bars. Adults I 

 have seen from the Commander and Aleutian Islands are no darker 

 above, in fact they are somewhat lighter, in color than those from the 

 Queen Charlotte Islands; but the under parts are whiter, less buffy, 

 than in anatum, and they are more extensively spotted and streaked 

 on the upper breast and jugulum. Young birds from the Aleutian 

 Islands are much darker than those I have seen from the Queen 

 Charlottes, and very much darker than the darkest of our eastern 

 birds. Duck hawks from interior and northern Alaska and from the 

 Pacific coast south of latitude 50° N. are clearly referable to anatum, 

 as are also those from Admiralty Island and the Sitkan region. 



Nesting. — The nesting habits of Peale's falcoD are not essentially 

 different from those of other peregrines. Among the Aleutian Islands 

 in 1911 we saw these falcons on Atka, Kiska, Tanaga, and Adak 

 Islands. At Kiska Harbor, on June 19, I watched a pair flying about 

 some high cliffs; they were apparently building a nest on an inaccessible 

 ledge, as I saw one of them fly up with a stick in its claws. I also 

 saw a pair mating on Atka Island on June 13. They are apparently 

 late breeders in that region. We did not succeed in finding any 

 occupied nests or in securing any specimens of the birds. 



We shot one bird, but it fell over a high cliff and could not be found 

 among the piles of loose rocks at the base. 



Major Brooks (1926) says: 



