"We don't believe that Bryan's Shearwaters breed regularly on Midway or other Northwestern Hawaiian Islands, based on the extensive seabird work in these islands by biologists with the Pacific Seabird Project," Pyle said. The specimen was the only observation during this extensive project, which occurred on islands and atolls throughout the North Pacific from 1963 until 1968. "They would almost certainly have encountered more Bryan's shearwaters then and since if they bred regularly in the Northwestern Hawaiian Islands." Given that Bryan's shearwaters have remained undiscovered until now, they could be very rare. It is sadly even possible that they went extinct before ever being recognized, although there is at least one more record of a bird in a burrow on Midway from 1990, and observations at sea of what could be Bryan's Shearwaters as recently as 2005.