The European Shag breeds on coasts, nesting on rocky ledges or in crevices or small caves. The nesting season is long, beginning in late February but some nests not started until May or even later. Three eggs are laid. The chicks hatch without down and so they rely totally on their parents for warmth, often for a period of two months before they can fly. Fledging may occur at any time from early June to late August, exceptionally to mid-October.
This little guy will grow up to be a huge bird, 68 to 78 cm long and with a 95-to-110-centimetre wingspan.