Dogs are kept in the village and used to herd sheep on the mountain; formerly a few feral dogs roamed on Inaccessible, killing many birds, including penguins; feral dogs also roamed on Tristan following the 1961 evacuation. Sheep dogs
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Ryan, P. (ed.) (2007). Field Guide to the Animals and Plants of Tristan da Cunha and Gough Island. Pisces Publications, Newbury. 162 pp; Pagad S, Wong L J (2020). Global Register of Introduced and Invasive Species – Tristan da Cunha, Saint Helena, Ascension and Tristan da Cunha. Version 1.1. Invasive Species Specialist Group ISSG. Checklist dataset https://doi.org/10.15468/30wm6u accessed via GBIF.org on 2021-11-30.; personal communication on establishment status from RSPB