Photograph - Original Fine Art Photography By Bob Orsillo
Double-crested Cormorant ~ Original fine art nature bird waterfowl photography by Bob Orsillo.
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The Double-crested Cormorant is the most numerous and widespread North American cormorant. It's also the only one that occurs in large numbers inland as well as on the coast. Growing in numbers throughout its range, this cormorant is increasingly being blamed for declines in sport fisheries and for devastating fish farms.
The Double-crested Cormorant makes a bulky nest of sticks and other materials. It frequently picks up junk, such as rope, deflated balloons, fishnet, and plastic debris to incorporate into the nest. Parts of dead birds are commonly used too.
Large pebbles are occasionally found in cormorant nests, and the cormorants treat them as eggs.
Double-crested Cormorant nests often are exposed to direct sun. Adults shade the chicks and also bring them water, pouring it from their mouths into those of the chicks.
In breeding colonies where the nests are placed on the ground, young cormorants leave their nests and congregate into groups with other youngsters (creches). They return to their own nests to be fed.
Accumulated fecal matter below nests can kill the nest trees. When this happens, the cormorants may move to a new area or they may simply shift to nesting on the ground.
May 11th, 2012
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