HABITAT Seen overflying rivers or reservoirs, rarely landing.
SEASONAL BEHAVIOUR Spotted on both spring and autumn passage, especially in April and September.
DISTRIBUTION The few records mostly correspond to Aracena Reservoir, River J谩ndula and a pond in La Ropera (And煤jar); on suitable dates, however, Gull-Billed Terns are likely to pass through many other spots of Sierra Morena.