Alcidae is a family of seabirds commonly known as alcids, which includes species like puffins, auklets, and murres. These birds are primarily found in the northern hemisphere and are well adapted to life in cold oceanic environments. They are known for their distinctive body shapes, often featuring short wings and stout bodies, which help them dive for fish and other marine prey. Alcids are excellent swimmers and divers, using their wings to propel themselves underwater. Many species are also known for their striking plumage, especially during the breeding season. They typically nest on cliffs or rocky shores, where they lay eggs in burrows or crevices to protect them from predators.