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Common murre - Uria aalge

Classification

Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Alcidae
Genus: Uria

ICUN Redlist - World Status:

Least Concern

Description

The common murre is a pelagic seabird. It spends most of its life on the open sea, except during breeding season. It is is 15-17 inches in length and has a wingspan of 25-28 inches. It has short wings with a thin white bar, a black head and back, and a white chest and belly. It has a long, black pointed bill and black legs and feet. Males and females look alike. The common murre's coloring is duller in winter, and its neck and face may be white or gray.

Range

map During the breeding season, the common murre is found along the Pacific and Atlantic Coasts. On the Pacific Coast, it is found from Alaska south to California. On the Atlantic Coast, it is found from Labrador, Canada south to New Brunswick, Canada. It winters at sea from Newfoundland, Canada south to Massachusetts on the Atlantic Coast and from Alaska to southern California on the Pacific Coast. It is also found in Greenland and northern Europe and Asia.

Habitat

The common murre is found in open ocean waters in the winter and on rocky cliffs and islands in breeding season.

Diet

The common murre uses its torpedo-shaped body to dive underwater and catch prey like squid, krill, small fish, marine worms, shrimp, and mollusks. It uses its wings to help it swim, or "fly" underwater.

Life Cycle

The male and female common murre court each other by bowing and preening. They nest in large colonies on rocky ledges and cliffs. The female lays a single egg in a shallow depression in on the ground.

The egg can be green, blue, brown, white, or cream, and is shaped like a pear! If the egg is disturbed, it won't roll off the cliff! Instead it pivots around on its pointed end in a circle. Both the male and the female incubate the egg for 28-35 days. Both the male and the female care for and feed the chick until it fledges at 18-25 days. They bring the chick three to five fish each day.

When the chick is ready to fledge, the male swims below the cliff and calls out to it. The chick then hurls itself off the cliff edge and drops 800 to 1,000 feet into the ocean, where it swims out to its father! The male stays with the chick and cares for it and feeds it until it is able to fly when it is 39-46 days old. Scientists think the common murre leaves the nest before it can fly or feed itself because it is too difficult for the adults to continue to bring it enough food on land. The common murre mates when it is five to six years old.

Behavior

The common murre has to run across the surface of the water to take off in flight, but it is a strong flier once it is in the air. On land, it stands upright and looks like a penguin! The common murre is built for swimming and diving. It can stay underwater for up to a minute and can dive to about 150 feet.

Audio Credit: xeno-canto.org Ian Cruickshank