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Great Crested Tern

Thalasseus bergii

ML201859561

IBC1532093

©
Robert Humphries
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Penguin Island
Rockingham, Western Australia, Australia
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Latitude and Longitude -32.3057, 115.6908 Map

Age
Unknown
Sex
Unknown
Sounds
Behaviors
Breeding
Tags
Nest;
Specimen ID

Media notes

A Crested Tern drives a Silver Gull away from its nest. Crested Terns (Thalasseus bergii) breed in several rookeries on Penguin Island, part of the Shoalwater Islands Marine Park 50 km south of Perth, Western Australia. Losses of chicks and eggs are high, particularly by predation from Silver Gulls (Chroicocephalus novaehollandiae). The adult Terns sit tight on their nests, calling as the Gulls hover overhead or stand nearby, waiting for an opportunity to grab an egg or a small chick. Silver Gulls also harass adult Terns returning with fish for their chicks, repeatedly chasing them and often preventing them from landing at their nest. Elevation: 11 m. Date added to IBC: November 20, 2018.

Observation details

IBC scientific name: Thalasseus bergii gwendolenae.

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