1 1 4 NORTH AMERICAN FAUNA 76 



places away from riparian areas. We found 80.0 pairs per square kilome- 

 ter in disturbed and 40.0 pairs per square kilometer in undisturbed 

 riparian plots mainly in dense, tall shrub thickets within timberline at the 

 Tuluksak River in 1983. Adults there carried food to young beginning on 

 26 June 1962 and 24 June 1974, and fledged young were seen between 

 1 and 13 July 1974, 11 July 1979, and 7 July 1978. We first heard 

 postbreeding songs from 8 August 1962, 29 July 1974, and 6 August 1979 

 to as late as 21 August 1977. Birds were last seen on 25 August 1974. 



Wilson's warbler (Wilsonia pusilla), Asr (31 May-7 September). 

 Specimen: RMS 1962/36/51. 



This warbler nested throughout the inland portion of the study area 

 and probably nested in coastal areas. We found breeding birds each year 

 at the Salmon and Tuluksak rivers, territorial birds at the Kisaralik River, 

 Goodnews and Chagvan bays, and Cape Peirce, and birds at the Togiak 

 River (August 1973). Wilson's warblers were common in the Nyac area 

 on 15 July 1980 (Mindell 1983), common along the Kisaralik River in 

 1982 (Mindell 1983), found there in 1985 (1-15 birds per day during 

 6 days on 12-20 August; M. Brown et al., unpublished), and were 

 present there in 1987 (16-21 June; B. J. McCaffery, personal communi- 

 cation). Warblers were also found at the Kwethluk River (1-15 birds 

 per day over 8 days on 1 1-27 July 1985; M. Brown et al., unpublished) 

 at the Eek River (up to >15 birds per day during 1 1 days on 17-29 June 

 1985; M. Brown et al., unpublished), at Kagati Lake (M. J. Fry, unpub- 

 lished), and at the Kanektok River (abundant in June 1977; White and 

 Boyce 1978). E. H. Miller (unpublished), R. Macintosh (unpublished) 

 and P. D. Ameson and D. B. McDonald (personal communication) found 

 warblers at Round Island in June 1972, 1976, and 1977, respectively. 

 P. D. Ameson and D. B. McDonald (personal communication) suspected 

 that they nested at Round, Crooked, and High islands in 1977. 



Territorial Wilson's warblers used all woodland-shrub thicket habi- 

 tats 6-450 m asl. Birds were most common in riparian tall shrub thickets 

 and less common in other shrub formations. Territorial birds also occa- 

 sionally used dense closed spruce with little understory. We found 

 66.7 pairs per square kilometer in disturbed and 44.3 pairs per square 

 kilometer in undisturbed riparian plots in 1983 at the Tuluksak River. 

 Families with newly fledged young were generally found between 

 26 June- 14 July 1974 and as late as 28 July 1974 at the Tuluksak River. 

 We found birds to 25 August 1974 and 23 August 1977 inland and as late 

 as 7 September 1976 on the coast. 



