The Last Jedi's Porgs are Just Puffins, Which The Film Crew Couldn't Get Rid Of

“From what I gathered, Rian Johnson had gone to shoot this sequence on Skellig Michael, and that island is covered in puffins.”

from gizmodo http://www.gizmodo.co.uk/2017/12/the-last-jedis-porgs-are-just-puffins-which-the-film-crew-couldnt-get-rid-of/