[3] In 2013 a specimen was retrieved from Arizona near the Colorado River, marking the first inland North America record of this species.

[4] On August 7, 2023, a Hawaiian petrel was reported near Cape Arago, proximate to Coos County, Oregon.

New research employing microwave telemetry shows that the birds travel as far as Alaska and Japan during two-week-long feeding trips.

In addition to loss of habitat from development, the greatest threats to the petrel are feral cats, small Asian mongooses, and rats, all of which feed on the helpless chicks when they are inside their burrows.

At the recommendation of federal wildlife officials, Hawaiʻi switched to digital television on 15 January 2009, a month ahead of the nationwide FCC mandatory conversion, in order to preserve the nesting season of the ʻuaʻu.

The earlier digital conversion allowed nearby analog transmission towers to be destroyed without disrupting the nesting season, which begins in February.