Gannet Colony Welfare: Nesting, Chick Rearing and Migration

Gannet colonies are among Britain's most spectacular wildlife sights, with welfare depending on colony protection, prey availability and safe migration routes.

Key Facts

Bass Rock in Scotland holds the world's largest northern gannet colony with 150,000+ birds
Gannets nest in densely packed colonies where territory defence involves aggressive displays
Both parents share incubation and chick rearing over a 90-day period
Chicks fledge by throwing themselves into the sea and swimming south before learning to fly properly
Gannets travel to West Africa for winter encountering longline fishing fleets that cause bycatch mortality

Welfare Considerations

Gannet welfare in colony settings depends on prey availability within foraging range of the breeding site. Climate-driven fish distribution changes require gannets to travel further, increasing energy expenditure and reducing chick feeding frequency. Plastic entanglement at colony sites, where material is incorporated into nests, causes wing injuries and death. Migration to West African waters exposes birds to longline bycatch. Colonial nesting means that disease or toxic events affecting one part of the colony spread rapidly, creating potential for mass welfare events. Colony protection and prey conservation are the primary welfare interventions available.

What You Can Do

Visit gannet colonies from boats maintaining distances that prevent disturbance
Support marine protected area designations around key gannet foraging grounds
Contribute to clean-up events preventing plastic from reaching breeding colonies
Advocate for bycatch mitigation requirements in fisheries operating on gannet migration routes