Phoebastria nigripes
x
x\
California, September
x
x
California, September
x
x
California, September
x
x
California, September
x
x
California, August
x
x
California, August
x
x
California, September
x
x
California, September
x
x
California, September
x
x
California, October
x
x
California, October
x
x
California, October
x
x
California, October
x
x
California, October
x
x
California, October
x
x
California, October
x
x
California, October
x
x
California, October
x
x
California, October
x
x
California, October
x
x
California, October
x
xx
California, October
x
x
California, October
x
x
California, October
x
x
California, October (with Western Gull)
x
x