This species is the originally called "Mother Cary's Chicken" by the sailors. They nest abundantly on many of the islands off the coasts of Europe and the British Isles, laying their single egg either in burrows or crevices among the cliffs. Data. - Coast of County Kerry, Ireland, June 1, 1895. Single egg laid at the end of burrow in a sea cliff. Size 1.05 x.80; white with a wreath of very fine dots about the larger end. Collector, G. H. McDonald.