Matsudaira's Storm-Petrel
Hydrobates matsudairae
Dark brown, lanky seabird, large and long-billed for a storm-petrel, with long, angular wings Breeds on southern Japanese islands and winters in the tropical Pacific and Indian Oceans. Powerful, slow flight style contrasts with swifter flight of smaller species. Somewhat resembles the larger Bulwer’s Petrel, but Matsudaira’s tail is forked, not wedge-shaped. Bright white shafts of the primary feathers give it an almost skua-like appearance, even from a distance. Swinhoe’s Storm-Petrel similar but smaller, with more graceful flight style. Tristram’s Storm-Petrel also similar but lacks the primary shafts and usually has a more contrasting carpal bar.
Identification
Matsudaira's storm petrel (Hydrobates matsudairae) is a species of seabird in the family Hydrobatidae. 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. It was formerly defined in the genus Oceanodroma before that genus was synonymized with Hydrobates. 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.
Taxonomy
Genus: Hydrobates; Family: Hydrobatidae; Order: Procellariiformes.
- Scientific name
- Hydrobates matsudairae
- Authority
- (Kuroda, Nm, 1922)
- Order
- Procellariiformes
- Family
- Hydrobatidae
- Genus
- Hydrobates
Range and habitat
Breeding range: IO, PO : Kita-Iwojima and Minami-Iwojima (Iwo=Volcano Is., s of Ogasawara=Bonin Is., s of Japan). Non-breeding range: w Micronesia through seas of e Indonesian Arch., nw of Australia to Chagos Arch. (s of Maldives), Arabian Sea, Seychelles, and off e African coast.
- Breeding range
- IO, PO : Kita-Iwojima and Minami-Iwojima (Iwo=Volcano Is., s of Ogasawara=Bonin Is., s of Japan)
- Non-breeding range
- w Micronesia through seas of e Indonesian Arch., nw of Australia to Chagos Arch. (s of Maldives), Arabian Sea, Seychelles, and off e African coast
- Migration
- Complete migrants
Behavior
Migration pattern: Complete migrants.
Conservation
- Population trend
- unknown
Photos
Distribution
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