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Tresco
Illustrated Checklist
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Native and Naturalized (305)
Exotic: Provisional (3)
Exotic: Escapee (5)
Hybrids (4)
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Benjamin Rousseau on 27 Jun 2023
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Craig Robson on 31 Oct 1982
- Herring x Lesser Black-backed Gull (hybrid) Larus argentatus x fuscusLast observed by Kris Webb on 7 Nov 2021
Additional Taxa (23)
- Common/Spotted Sandpiper Actitis hypoleucos/maculariusLast observed by Anonymous eBirder on 28 Sep 1967
- Black-headed/Mediterranean Gull Chroicocephalus ridibundus/Ichthyaetus melanocephalusLast observed by Kris Webb on 16 Aug 2020
- Great Cormorant/European Shag Phalacrocorax carbo/Gulosus aristotelisLast observed by Keir Randall on 13 Jul 2015
- Willow Warbler/Common Chiffchaff Phylloscopus trochilus/collybitaLast observed by Jared Wilson on 19 Sep 1991
- Gray-cheeked/Bicknell's Thrush Catharus minimus/bicknelliLast observed by Martin Reid on 20 Oct 1986
- Black-headed/Red-headed Bunting Emberiza melanocephala/brunicepsLast observed by Graeme Spinks on 21 Oct 1994