The Newell's Shearwater is a seabird that is endemic to the Hawaiian Islands. It mostly breed on Kauai. I saw this bird in the open-air lobby of the Kauai Marriott Resort. It was twilight and I only had my iPhone.

They feed by diving into deep water and swimming down to a dept of up to 10 meters using their wings to swim forward. Diet is probably squid and small fish.