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Double-Crested Cormorant

Phalacrocorax auritus

The Double-Crested Cormorant is a versatile bird and can be found in either salt or fresh water environs. During most of the year, the double crests that give this bird its name are not visible. Only during the breeding season do these features develop. When these birds build nests in trees, the accumulation of fecal matter can kill the nest tree. Abandon structures such as derricks are fair game for these birds to nest in, but ground nesting is also common.

Double-Crested Cormorants often live more than 20 years, but they rarely breed until the age of three. The duties of raising the young is shared by both parents. In some regions there is concern about overpopulation, and measures have been taken to reduce their numbers.

Science recognises five subspecies of this bird.

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