100 



NORTH AMERICAN FAUNA 76 



Fig. 22. Common raven at a spot used for roosting and eating prey captured along 

 the seabird clilfs 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 5.8 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 4.5 ± 0.39 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 



