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Common tern

During the breeding season, the common tern can be seen around our coasts and also inland at gravel pits, reservoirs and lakes. It nests in noisy colonies and can be spotted plunge-diving for fish.

Enw gwyddonol

Sterna hirundo

Pryd i'w gweld

April to September

Species information

Ystadegau

Length: 31-35cm
Wingspan: 77-98cm
Weight: 90-150g
Average lifespan: 12 years

Statws cadwraethol

Classified in the UK as Amber under the Birds of Conservation Concern 5: the Red List for Birds (2021).

Ynghylch

The common tern is a medium-sized tern and the one you are most likely to see inland, as well as at the coast. Common terns breed on shingle beaches, rocky islands and inland on the gravelly shores of lakes and rivers. They are noisy in their colonies and, like most terns, will attack intruders threatening their nests. They hover over the water before plunge-diving to catch their fish prey.

Sut i'w hadnabod

Common terns and Arctic terns can be very difficult to tell apart. The common tern is whiter below, has shorter tail streamers, and has a longer bill, which is orangey-red with a black tip. It is silvery-grey above, with a black cap and short, red legs.

Dosbarthiad

A summer visitor, nesting on gravelly beaches and islands around the coast and on inland flooded gravel pits and reservoirs.

Roeddech chi yn gwybod?

The common tern's long tail 'streamers' (feathers extending past the main tail) have earned it the nickname 'sea-swallow'.