Trindade Petrel

North America


Pterodroma arminjoniana


  • Habitat loss
  • Invasive mammals

The Trindade Petrel is a tube-nosed seabird species that can be found on two Brazilian islands in the South Atlantic Ocean. Its name is a tribute to the ship HMS Herald where the naturalist-discoverer was on board.

Also called Herald Petrel, it belongs to the gadfly petrel family which is known for its flight action that is both fast and evasive as if trying to avoid predators or nuisance species. It is distinctly characterised by its two colour morphs: dark and light – interweaving in different parts of its body.

This highly pelagic seabird species has a very small population that nests and breeds year-round on rocky slopes, ridges, and cliff ledges of Trindade. Both parents are actively involved in raising the hatchlings – feeding them with regurgitated food.

The main threats to the existence of the Trindade Petrel are potential loss of habitat and predatory animals. Because it only breeds on a very specific location in the South Atlantic Ocean, any man-made developments can cause severe nest disturbance. Furthermore, feral cats, pigs, and goats destroy the nests, eat the eggs, and even kill the adult petrels.