The Common Guillemot (Uria aalge) is a sleek seabird, recognized by its dark brown or black upperparts and white underparts, with a thin, pointed beak. This species often nests in large, dense colonies on steep cliffs, where it lays its distinctive pear-shaped eggs to prevent them from rolling off ledges. Common Guillemots are expert divers, plunging deep into the ocean to catch fish and other marine prey. Studying Common Guillemot colonies provides valuable information on their social behaviors and how they cope with changes in their marine environment, making them key indicators of ocean health.
