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Sternula saundersi – Saunders's Tern non-native
Species, Bird, Marine
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Tadorna ferruginea – Ruddy Shelduck non-native
Species, Bird, Freshwater, marine, terrestrial
Hwyaden Goch yr Eithin, Hwyaid Coch yr Eithin
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Thalasseus albididorsalis – West African Crested Tern non-native
Species, Bird, Marine
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Thalasseus bergii – Greater Crested Tern non-native
Species, Bird, Marine