Common Murre (Uria aalge) lives in north Atlantic coast across North America. It feeds on fish and crustaceans. Its conservation status is Least Concern.
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Common murres can plunge to the ocean's mid-depth like underwater rockets, routinely diving 30-60 m (100-195 ft) and once recorded at a staggering 180 m (590 ft). Their wing-powered "flight" underwater lets them chase schools of fish for up to a minute, covering more than 30 m (100 ft) each plunge.
A single square metre of cliff can hold up to twenty breeding pairs, creating "loomeries" so dense that neighbours are often in bodily contact. The pair lays one pyriform egg on bare rock, incubates it for 28-34 days, and the downy chick leaves the ledge after just 20-22 days, gliding from heights of up to 457 m (1 499 ft) before the male feeds it at sea.
The world hosts roughly 7.3 million breeding pairs, about 18 million individual murres. Yet a massive die-off in the northeast Pacific in 2016 left birds emaciated and starving, and a marine heat wave between 2014 and 2016 wiped out half the Alaskan population, with no recovery as of 2024.
When they take to the air, common murres zip along the sea surface at 80 km/h (50 mph) with rapid wing beats, but their high wing loading of 2 g/cm² makes take-off a struggle and limits agility. After breeding they shed their primary feathers and become flightless for 45-60 days.
A typical murre gobbles 20-32 g (0.7-1.1 oz) of fish each day, preferring tiny schooling prey no longer than 200 mm (8 in) such as capelin, sand lances and sprats. They snatch a single fish, hold it lengthwise with the tail dangling, and fly back to the nest, a feeding style that directly links chick growth to local fish density. Because each trip delivers only one fish, any dip in small-fish abundance instantly reduces provisioning rates, making murre colonies sensitive barometers of marine food-web health.
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In the turbulent waters of the North Atlantic, the Common Murre cuts a sleek figure, its tuxedo-like feathers glistening with sea spray as it dives with precision, propelled by powerful wings that beat at a furious pace. With eyes like polished onyx, this agile bird navigates the treacherous shoreline with ease, its webbed feet barely touching the waves as it chases the schools of fish that dart through the kelp forests. As it rises to the surface, the Murre's raucous call echoes through the misty veil, a primal declaration of its dominance over this unforgiving yet majestic realm.
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