The biggest of our terns (L 53 cm), with black crown, strickingly big bright red bill and forked tail. Colonies are usually alongside salt, brackish or freshwater lagoons with moderately dense vegetation or on small islands. The diet consists almost entirely of fish, with a few insects also being taken. Migrant.
Reasons for the need for protection/inclusion in annex I
Colonies are often ephemeral and are susceptible to human disturbance, predation by gulls, crows and Amerikan mink (Mustela vison), fluctuations in fish stocks and flooding.
yellow = summer visitor
green = resident
blue = winter visitor
about 1,300 pairs
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