Distribution limit marked in blue and yellow spots indicate known breeding sites of the now extinct Great Auk. Note: does not include known Iberian Peninsula range http://www.patrimoniocultural.gov.pt/media/uploads/revistaportuguesadearqueologia/11.2/17_18/18_p.361-370.pdf
Own work using:

Map in Symington Grieves 1855 map in his book on the Great Auk.
BirdLife International. 2016. Pinguinus impennis. The IUCN Red List of Threatened Species 2016: e.T22694856A93472944. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22694856A93472944.en. Accessed on 11 December 2022.
Shyamal