Swinhoe's Petrel (Swinhoe's Storm-Petrel)
Oceanodroma monorhis
This browner cousin of the Leach's Petrel breeds in the western Pacific. However females have been trapped in Europe, including some with brood patches, and three have been caught on the coast of Tyne and Wear in the summer (1989 — 1993) — one individual in all of the last four of these years. Who knows what they are doing!
From The State of the Nations Birds
Copyright © 2000 by Chris Mead