Matsudaira's storm petrel

Matsudaira's storm petrel (Hydrobates matsudairae) is a species of seabird in the family Hydrobatidae.

Matsudaira's storm petrel
Conservation status
Vulnerable  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Procellariiformes
Family:	Hydrobatidae
Genus:	Hydrobates
Species:	H. matsudairae
Binomial name
Hydrobates matsudairae (Kuroda, Nm, 1922)
Synonyms
Oceanodroma matsudairae

It breeds solely in the Volcano Islands in the northwest Pacific Ocean, and winters in the Indian Ocean.

Its common name and Latin binomial commemorate the Japanese ornithologist Yorikatsu Matsudaira.^[2] It was formerly defined in the genus Oceanodroma before that genus was synonymized with Hydrobates.^[3] The genus name Bianchoma Mathews, 1943 was created for this particular species, though that name is now a synonym of Hydrobates.

As the image shows, Matsudaira's storm petrel can be told by its blackish alula feathers, which are offset by white bases to its dark primaries. The tail is long and greatly forked, and the beak is also lengthy with a pronounced hook at its tip.