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Oeiras
Illustrated Checklist
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Native and Naturalized (204)
Exotic: Provisional (3)
Exotic: Escapee (8)
Additional Taxa (35)
- Black-headed/Mediterranean Gull Chroicocephalus ridibundus/Ichthyaetus melanocephalusLast observed by Frederico Henriques on 22 Oct 2023
- Herring/Yellow-legged Gull Larus argentatus/michahellisLast observed by Marcio Cachapela on 29 Oct 2018
- Yellow-legged/Lesser Black-backed Gull Larus michahellis/fuscusLast observed by Ricardo Silva on 10 Apr 2024
- Willow Warbler/Common Chiffchaff Phylloscopus trochilus/collybitaLast observed by Martin Beal on 10 Apr 2022
- Common/Iberian Chiffchaff Phylloscopus collybita/ibericusLast observed by Frederico Henriques on 23 Mar 2024