Pterodroma heraldica
The Herald Petrel (Pterodroma heraldica) is a medium-sized gadfly petrel of the family Procellariidae, renowned for its extensive pelagic existence across the tropical and subtropical Pacific Ocean. Averaging 33-39 cm in length with an impressive wingspan of 80-92 cm and weighing 300-450g, this species exhibits a sleek, aerodynamic build perfectly adapted for oceanic flight. Key identification marks include dark upperparts, a variable dark cap or hood contrasting with paler underparts, and a ...
This truly pelagic seabird spends most of its life over open tropical and subtropical ocean waters, only coming ashore to breed on remote, predator-free islands, typically nesting in burrows or rock crevices on vegetated slopes.
Herald Petrels primarily feed on squid (cephalopods) and small fish, supplemented by crustaceans, obtained by surface-seizing, dipping, and skimming from the ocean surface.
Herald Petrels exhibit a fascinating dichotomy in their daily activity; they are strictly nocturnal at their breeding colonies to avoid avian predators, arriving and departing under the cover of darkness, but are largely diurnal when foraging at sea. Their foraging strategy involves surface-seizi...
The Herald Petrel breeds on numerous remote islands across the tropical and subtropical Pacific Ocean. Significant breeding populations are found on islands within French Polynesia (including the Marquesas, Tuamotus, and Gambier Archipelagos), the Pitcairn Group (Henderson, Ducie, and Oeno Island...
Least Concern
- Herald Petrels are known to produce a waxy stomach oil, which they can projectile-vomit up to a meter as a defense mechanism against predators, and also use to feed their chicks or as a concentrated food source during long foraging trips. - These oceanic wanderers can live for over 20 years, wi...