European Shag

The European Shag is a slender, entirely dark seabird with an oily bottle-green iridescence visible in good light. Breeding adults develop a distinctive quiff-like crest that curves forward from the crown, along with bright yellow skin at the base of a thin, hook-tipped bill. It is smaller and more streamlined than the Great Cormorant, with a steeper forehead and thinner neck.

Shags are true birds of the open, rocky coast, rarely straying inland or onto still freshwater, and are commonly seen standing upright on rocks and cliff ledges with wings outstretched to dry.

Key field marks

• Slim, all-dark plumage with a glossy green sheen
• Forward-curling crest present in breeding adults
• Thin bill with a hooked tip and yellow gape
• Steep forehead and slender neck, giving a more delicate profile than a cormorant

Similar species

• Great Cormorant is bulkier, has a flatter head, a white throat patch, and lacks a crest.
• Immature Shags are brownish and can be confused with young cormorants, but their slimmer bill and steeper forehead help distinguish them.

Habitat

Exclusively coastal, favoring rocky shores, sea cliffs, and offshore islands with clear, relatively deep water for diving.

Range

Breeds along the coasts of western and southern Europe, North Africa, and into the Black Sea.

Migration

Mostly resident or short-distance disperser, with some northern populations moving south along the coast in winter.

Behavior

An accomplished diver capable of reaching considerable depths, often seen porpoising before submerging and resurfacing some distance away.

Voice

Generally silent, though it gives harsh clicking and hissing calls at breeding colonies.

Feeding

Hunts fish, especially sand eels, by pursuit-diving underwater, propelled by its feet.

Nesting

Nests on rocky ledges and in crevices along sea cliffs, building a bulky nest of seaweed and twigs; typically lays 3 pale blue eggs.