. Birds of the Kilbuck and Ahklun mountain region, Alaska. Birds Alaska Bristol Bay Region. 100 NORTH AMERICAN FAUNA 76. Fig. 22. Common raven at a sjx>t used for roosting and eating prey captured along the seabird cliffs at Cape Peirce. Photo by M. H. Dick. Common raven {Corvus corax). Apr. Ravens (Fig. 22) were ubiquitous. Birds nested at the Salmon River, the Tuluksak River, Goodnews Bay, Chagvan Bay, and Cape Peirce (MHD photo; MRP photo) and were common at all other locations. On 48 km of streams at the Tuluksak River, we found 1-2 pairs per year during 1974-79 that reared young pe
. Birds of the Kilbuck and Ahklun mountain region, Alaska. Birds Alaska Bristol Bay Region. 100 NORTH AMERICAN FAUNA 76. Fig. 22. Common raven at a sjx>t used for roosting and eating prey captured along the seabird cliffs at Cape Peirce. Photo by M. H. Dick. Common raven {Corvus corax). Apr. Ravens (Fig. 22) were ubiquitous. Birds nested at the Salmon River, the Tuluksak River, Goodnews Bay, Chagvan Bay, and Cape Peirce (MHD photo; MRP photo) and were common at all other locations. On 48 km of streams at the Tuluksak River, we found 1-2 pairs per year during 1974-79 that reared young per year and 3 pairs per year in 3 years during 1981-87 that reared 13-3 young per year. The increased density and fledging success corresponds with increased amounts of garbage at Nyac. In a 260-km2 area near Goodnews and Chagvan bays, we found three nesting pairs and three old nests June-July 1974. At Cape Peirce, we found three to four pairs per year nesting during 3 years. One or more pairs nested at Round, Crooked, and Hagemeister islands and were "suspected" to nest on High Island in 1977 (P. D. Ameson and D. B. McDonald, personal communication). Ravens nested on cliffs and in poplar trees and on old machinery and buildings to 370 m asl. Twelve successful pairs fledged ± young per nest (range, 3-6) at inland sites, and 6 broods averaged 3-8 young per pair (range, 3-6) at coastal sites. At Cape Peirce, birds were incubating. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Petersen, Margaret R; Weir, Douglas N; Dick, Matthew H; U. S. Fish and Wildlife Service. [Washington, D. C. ] : U. S. Dept. of the Interior, Fish and Wildlife Service
Size: 1982px × 1261px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorusfishandwildlifeservice, bookcentury1900, bookcollect
