Head to head
Peruvian Diving-petrel vs Common Diving-petrel
Both species fly underwater to catch prey, but one is thriving across a broad range while the other has lost much of its traditional nesting habitat.
| Peruvian Diving-petrel | Common Diving-petrel | |
|---|---|---|
| Scientific name | Pelecanoides garnotii | Pelecanoides urinatrix |
| Range | Desert coasts of Peru and Chile | Islands across the Southern Hemisphere |
| Nesting substrate | Burrows dug into guano deposits | Burrows dug into soil |
| Main threat | Guano mining destroying nesting habitat | Not documented as significantly threatened |
| Conservation status | Endangered | Least Concern |
| Population trend | Decreasing | Stable |
| Distribution | Confined to the Humboldt Current system | The most widespread diving-petrel species |
| Habitat | Ocean, coastal | Ocean, coastal |
Peruvian Diving-petrel vs Common Diving-petrel: common questions
Which one has declined the most?
The Peruvian diving-petrel has declined far more sharply, driven by guano mining destroying its nesting habitat, unlike the common diving-petrel, which remains stable across a much wider range.
Why does guano mining threaten the Peruvian diving-petrel specifically?
This species nests in burrows dug into guano deposits, so commercial mining of those deposits directly destroys its nesting habitat, a threat not shared by the common diving-petrel, which nests in ordinary soil.
Which one has the wider overall range?
The common diving-petrel has the wider range, recognised as the most widespread diving-petrel species, unlike the Peruvian diving-petrel, which is confined to the Humboldt Current system off Peru and Chile.