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Alcatraz Island
Illustrated Checklist
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Native and Naturalized (177)
Hybrids (2)
- Western x Glaucous-winged Gull (hybrid) Larus occidentalis x glaucescensLast observed by James White on 25 Apr 2023
- Herring x Glaucous-winged Gull (hybrid) Larus argentatus x glaucescensLast observed by logan kahle on 25 Jan 2015
Additional Taxa (36)
- Western/Clark's Grebe Aechmophorus occidentalis/clarkiiLast observed by Moses Michelsohn on 19 Apr 2024
- Long-tailed/Parasitic Jaeger Stercorarius longicaudus/parasiticusLast observed by Caleb Powell on 27 Nov 2019
- Sooty/Short-tailed Shearwater Ardenna grisea/tenuirostrisLast observed by Caleb Powell on 27 Nov 2019
- Sharp-shinned/Cooper's Hawk Accipiter striatus/cooperiiLast observed by Guillermo Navalon on 12 Aug 2022
- Mitred/Red-masked Parakeet Psittacara mitratus/erythrogenysLast observed by Caleb Powell on 27 Nov 2019
- large parakeet sp. (former Aratinga sp.) Eupsittula/Aratinga/Thectocercus/Psittacara sp.Last observed by Caleb Powell on 27 Nov 2019