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Pioneer Sea Canyon (SF Co.)
Illustrated Checklist
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Native and Naturalized (54)
Hybrids (1)
- Western x Glaucous-winged Gull (hybrid) Larus occidentalis x glaucescensLast observed by Carl Schroeder on 16 Sep 2011
Additional Taxa (9)
- Red/Red-necked Phalarope Phalaropus fulicarius/lobatusLast observed by Josiah MT Clark on 19 Aug 2023
- Long-tailed/Parasitic Jaeger Stercorarius longicaudus/parasiticusLast observed by Alvaro Jaramillo on 30 Sep 2013
- Parasitic/Pomarine Jaeger Stercorarius parasiticus/pomarinusLast observed by Josiah MT Clark on 19 Aug 2023
- Scripps's/Guadalupe Murrelet (Xantus's Murrelet) Synthliboramphus scrippsi/hypoleucusLast observed by TONY STEWART on 13 Sep 2010