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Flightless cormorant

Flightless cormorant in the Galapagos Islands, Ecuador
© Marek Jackowski

Common name:

Flightless cormorant

Scientific name:

Phalacrocorax harrisi

Spanish name:

Cormoran mancón

Conservation status:

Vulnerable

EX EW CR EN VU NT LC

Average lifespan:

Up to 50 years

Average size:

90 centimetres

Maximum size:

1 metre

Average weight:

3 kilograms

Maximum weight:

5 kilograms

Overview

The Galapagos flightless cormorant is an endemic species to Galapagos, and is not only the heaviest cormorant species, but also the only one out of 29 species which cannot fly. They are therefore confined to the lava shoreline and beaches of Isabela and Fernandina. The adults are black on top and dark brown underneath with bright turquoise eyes. They have stunted wings that are one third the size of the wingspan they would require to fly. They have four webbed toes (like all members of the cormorant family) and the females tend to be smaller than the males. Natural selection led to the species no longer having functional wings as they had very few land predators, and individuals that were better suited to swimming were more successful in passing on their genes.

Flightless cormorants in Galapagos

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6th Oct 2016
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