Colony Status Record 



r i 5 h o WilJlire Service 



U.S 



Area Number 



477 007 



Colony Name Piedras Blancas Rock Field No. 



Observer (s) Nelson, Sowls 



Map Piedras Blancas. Ca. Lat .3539'52" LoBg- 12117 ' 18" Ti:n |/26 9 



Weather 



nvprragr . 1 ighf hreeze from NW. swells 6'. waves 



9:4 9a t e.f 



F. C 



6/26/79 - boat 



8/2/79 - aerial 



No . No . 



Nests Birds 



Remarks 

 (estimated minimum maximum, egg & chick status, etc.) 



Fork-called Storm Petrel 

 Leach's Storm Petre 1 

 Ashy Stem Petrel 

 Brown Pelican 

 Cormorant (unld. ) 

 Brandt's Cormorant 

 Double-crested Cormorant 

 Pelagic Cormorant 

 Black Oystercatcher 

 Cull (unld.) 

 Glaucous -winged Cul 1 

 Western Gull 

 Least Tern 

 Forster's Tern 

 Caspian Ten. 

 Common Murre 

 Pigeon Guillemot 

 Marbled Murrelet 

 Xantus ' Murrelet 

 Cassin's Auklet 

 Rhinoceros Auklet 

 Tufted Puffin 



rnngf 



roost 



680 1360 



E 25 



count made from aerial slide taken 8/2/79. 

 Most nests in a "bowl" on the S.W. side of. 



the island - these cannot be counted from 

 the mainland or from a boat, pata qual. = II. 



:R-|I-HB were counted that appeared to be on 

 territories, number estimated conservative. 

 Data quality * III. 15 nests est. on S. side. 

 9 nests est. on vestcrn side & A nests est. 

 on S.E. side. 



Good habitat, 24 birds either on the island 

 or lust offshore. .. . 



One seen flying W. from island on 6/25 in 

 . pi/tm-Ing. Reynolds. CDF&C est. 1 pr. here 



in 1970. Mark Rauzon. USFWS - seaotter prog, 

 has seen no more than 2-3 puffins here. Rock 

 does not appear to have soil, but it may be 

 present and covered with guano. 



Pecorrer.ded Classification: Colony Complex 



Colony 



Sub-colony 



Roost Area 



MARINE HAMHALS 



Figure 5. Colony Status Record, front. 



352 



