Procellaria westlandica
The Westland Petrel, *Procellaria westlandica*, is a majestic, all-dark seabird endemic to New Zealand, breeding exclusively on the forested cliffs of the South Island's west coast. Measuring approximately 50-55 cm in length with an impressive wingspan of 135-140 cm and weighing around 800-1200g, its plumage is uniformly sooty-black. A key identification feature is its pale, yellowish-horn bill with a distinctive black tip, contrasting sharply with its dark body and making it distinguishable ...
Breeds in coastal temperate forests, typically on steep slopes and ridges near the sea, often in burrows under dense vegetation. Forages exclusively over open ocean, from continental shelf waters to pelagic zones.
Primarily opportunistic feeders, consuming fish, squid, and crustaceans. They frequently scavenge discards from fishing vessels, but also hunt live prey.
Westland Petrels are highly nocturnal on their breeding grounds, flying to and from their burrows under the cover of darkness to avoid aerial predators, creating a cacophony of calls throughout the night. At sea, they are diurnal foragers, employing a surface-seizing technique but also capable of...
The breeding range of the Westland Petrel is remarkably restricted, confined entirely to a small strip of coastal forest on the west coast of the South Island, New Zealand, specifically between Punakaiki and Barrytown in Westland. This area represents their only known nesting locality globally. A...
Vulnerable
- The Westland Petrel is the only petrel species that breeds exclusively on the mainland of New Zealand's South Island, making it a unique natural heritage. - They are strictly nocturnal on their breeding grounds, a crucial adaptation to avoid predation by gulls and skuas during the day. - Their ...