Wildlife

Common Tern Welfare in Coastal and Inland Colonies

Welfare guide for common terns -- elegant migratory seabirds nesting on beaches, shingle, and rafts.

Key Facts

Common terns are summer migrants breeding on shingle beaches, offshore islands, and artificial rafts
UK populations of around 11,000 pairs are subject to significant site fidelity -- colonies return to traditional sites
Disturbance at ground-nesting colonies causes chick mortality through exposure and predation
Rafts and artificial platforms provide predator-free nesting alternatives to vulnerable beach sites
Common terns dive to catch small fish -- welfare depends on adequate prey availability near nesting sites
Climate change is affecting sand eel distribution and availability -- a welfare concern for tern chick rearing
Egg collecting and nest disturbance remain welfare and legal concerns in some regions
Beach recreation during the breeding season is the most common direct welfare threat to common tern colonies

Welfare Significance

Common tern welfare at breeding colonies is directly linked to site security and fish availability. Human disturbance causing adults to flush from nests exposes eggs and chicks to lethal temperature extremes. Even brief disturbances during cold or hot periods can cause mass chick mortality. Simple exclusion measures -- roped-off beach areas -- have dramatic welfare effects during the breeding season.

What You Can Do

Respect tern colony exclusion zones on beaches from May to August
Keep dogs on leads near known tern nesting beaches
Support installation of predator-free nesting rafts at tern colonies threatened by tidal flooding
Donate to monitoring programmes that track common tern breeding success and welfare trends