Synthliboramphus antiquus (Ancient murrelet)

The ancient murrelet (Synthliboramphus antiquus) is a bird in the auk family. The genus name Synthliboramphus is from Ancient Greek sunthlibo, “to compress”, and rhamphos, “bill”, and antiquus is Latin for ancient. The English term “murrelet” is a diminutive of “murre”, a word of uncertain origins, but which may imitate the call of the common guillemot. Ancient murrelets are called “ancient” because they have grey on the back like a shawl, as worn by the elderly.

— Wikipedia