Also known as Sooty Storm-petrel(!)
Relationship to Tristram's
Storm-petrel is a little unclear, and may represent a pairing akin
to the cool- and hot-season breeding populations of Band-rumped Storm-petrel
(discussed in Monteiro and Furness, 1998). Based on personal experience
of both from the Ogasawara Islands, however,
I would say there are clear structural, plumage and size differences between
Matsudaira's and Tristram's Storm-Petrel and they are readily identifable
in the field.
Medium to large all dark storm-petrel
reminiscent of Black Storm-petrel but with diagnostic white primary shafts.
Head relatively large with steep forehead.
Where and When
Breeds on Kita-iwo-jima and Minami-iwo-jima
in the Japanese Volcano Islands. Ranges through tropical waters from the
western Pacific into the Indian Ocean as far as the east coast of African.
Kita-iwo-jima has not been visited for many years and the current population
status is unknown.
Photographs on the web
Monteiro, L.R. and Furness, R.W. (1998) Speciation through temporal segregation of Madeiran Storm-petrel (Oceanodroma castro) populations in the Azores? Phil. Trans. R. Soc London B 353:945-953.