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Gwynedd
Illustrated Checklist
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Native and Naturalized (283)
Exotic: Provisional (1)
Exotic: Escapee (3)
Hybrids (3)
- Graylag x Canada Goose (hybrid) Anser anser x Branta canadensisLast observed by Clyde Sorenson on 30 Jun 2024
- Mallard x American Black Duck (hybrid) Anas platyrhynchos x rubripesLast observed by Peter Hines on 31 Jan 1981
- Carrion x Hooded Crow (hybrid) Corvus corone x cornixLast observed by Eleanor Warren-Thomas on 23 Aug 2021
Additional Taxa (48)
- Common/Red-breasted Merganser Mergus merganser/serratorLast observed by Wayne Watkins on 22 Nov 2020
- Whimbrel/Eurasian Curlew Numenius phaeopus/arquataLast observed by Christopher Marsden on 25 Apr 2024
- Black-headed/Mediterranean Gull Chroicocephalus ridibundus/Ichthyaetus melanocephalusLast observed by Alex N on 20 Jul 2024
- West African Crested/Royal Tern Thalasseus albididorsalis/maximusLast observed by Pete Antrobus on 15 Jun 2009
- Cory's/Great Shearwater Calonectris diomedea/Ardenna gravisLast observed by Liam Curson on 29 Aug 2017
- black-and-white shearwater sp. Puffinus sp. (black-and-white shearwater sp.)Last observed by Anonymous eBirder on 9 Jun 2021
- Great Cormorant/European Shag Phalacrocorax carbo/Gulosus aristotelisLast observed by Jesse Davies on 29 Mar 2024
- Willow Warbler/Common Chiffchaff Phylloscopus trochilus/collybitaLast observed by Toby Dunstan-Legge on 11 May 2024
- Western/Eastern Subalpine Warbler Curruca iberiae/cantillansLast observed by Ian Fisher on 16 Jun 1996