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A photo of a Audouin's Gull (Ichthyaetus audouinii)
Audouin's Gull

Audouin's Gull

Ichthyaetus audouinii

The Audouin's gull, Ichthyaetus audouinii, presents itself as a large gull species, predominantly inhabiting the Mediterranean, the western coast of Saharan Africa, and the Iberian Peninsula. Its name pays homage to the French naturalist Jean Victoire Audouin. Resembling a small European herring gull, the adult Audouin's gull is distinguished by its short, stubby red bill and the unique "string of pearls" white wing primary tips. The legs of this bird are a subtle grey-green, and it takes a full four years for the gull to don its adult plumage.

Identification Tips

When observing the Audouin's gull, one should note the red bill and the distinctive pattern of white spots along the wingtips, which contrast with the larger "mirrors" seen in other gull species. These features are key to distinguishing it from its relatives.

Habitat

This gull favors coastal and pelagic environments, strictly adhering to regions where it can pursue its specialized diet.

Distribution

The Audouin's gull is found in the Mediterranean, along the western Saharan African coast, and on the Iberian Peninsula. It breeds on small islands, either colonially or in solitude.

Behaviour

Once considered one of the world's rarest gulls, the Audouin's gull has established new colonies but remains a rare sight with a population of around 10,000 pairs. This bird is not known to wander far from its breeding grounds, though occasional records exist of it appearing as far afield as the Netherlands, England, and even Trinidad.

Diet and Feeding

Unlike many of its kin, the Audouin's gull does not scavenge but is a specialist fish eater. It feeds at night, often far out to sea, and also patrols beaches, occasionally dipping its legs into the water to create drag, aiding in its hunting technique.

Breeding

The Audouin's gull breeds on small islands, laying 2-3 eggs in a ground nest. It has been known to breed both in colonies and as solitary pairs.

Conservation status

The Audouin's gull is currently classified as Vulnerable according to the IUCN Red List. It is also one of the species protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA).

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