Colony name 



Lot. -Long. 



004) 'Gull Rock N '3935'20"N,121 35'45 



Number breeding birds 



Investigators 

 Survey date 



Pelagic Cormorants 

 / Pelagic ConaoraBts 



b r 



" w 



40 (Nelson & Sowls, 6/14/79,8, II ) 

 48 (Osbome, 6/5/69} 



'A = 



x /NMrwv 



L. Clear lines give the most recent or the best estimates available. 

 Stipple lines give additional estimates for other years. 



Survey 

 type 



Data qua/. 

 - see text 



B = boat 



M = from mainland 



L = on sire 



"Rockport Rocks" 3944'10"N, 12350'00"W 



Brandt's Cormorant 

 Pelagic Cormorant 

 Black Oystercatcher 

 Western Gull 

 Pigeon Guillemot 



Total 

 Brandt's Cormorant 



X = present 







250 

 2 



10 



20 



282 



(Lester & Rods trom, 6/12/79,6,1 1) 



(Lester & Rodstrom, 6/12/79,6, III) 



(Lester & Sowls, 7/19/79, 6, III) 



(Lester & Sowls, 7/19/79, 6, III) 



(Lester & Rodstrom, 6/12/79, B.III) 



(Osborne, 8/26/69 ,H} 



42 

 42 

 42 

 42 

 42 



36 



Cape Vizcaino 3943'34"N, 12349'55"W 



Brandt's Cormorant 

 Pelagic Cormorant 

 Western Gull 

 Common Murre 

 Pigeon Guillemot 



Total 



Brandt's Cormorant 

 SraiKlt's Coriflorant 

 Pelagic Cormorant 

 Western Gull 



3,080 (Lester & Sowls, 7/23/80, A, II) 42 



120 (Lester & Rodstrom, 6/12/79,6, III) 42 



60 (Lester & Rodstrom, 6/12/79,6, III ) 42 



5,800 (Briggs & Lewis, 5/7/80, A, III) 42 



8 (Lester, Sowls & Stewart, 7/12/80, M, III) 42 



9,068 



1,000 (Osborne, 8/26/69, H) 36 



3,662 (Lester & Rodstrom, 8/2/79, A, II I) 42 



SO (Osborne, 8/26/69, M) 36 



40 (Osborne, 8/26/69, H) 36 



108 



