

Uria aalge (Common guillemot, Common murre North America)
The UK’s coasts have many stretches of sheer cliffs where seabirds breed and the guillemot is one of the most numerous birds in the great ‘seabird cities’. It comes to land only to nest, spending the rest of its life at sea, where it is vulnerable to oil spills. Dark brown and white, not as black as the similar razorbill, it has a 'bridled' form with a white ring round the eye and stripe behind it.
Breeds on narrow horizontal or sloping ledges on sheer cliffs, and on top of offshore rock stacks. The egg is cone-shaped as a cone-shaped object will roll in an arc helping to prevent it rolling off the cliff.
Spends the winter out at sea.
Fish and crustaceans
Loud whirring sound.
From March to the end of July.
| Guillemot Facts | |
| Eggs | One |
| Incubation | 28-34 Days |
| Fledging- Leave ledges | 2-3 Weeks |
| Fledging- Flight | 6-7 Weeks |
| Maximum lifespan | 10 Years |
| Length | 38-45 cm |
| Wingspan | 64-67 cm |
| Weight | 850-1,130 g |