Atlantic Puffin: Ecology, Conservation and Welfare

Atlantic Puffin (Fratercula arctica): An Ecological Overview

The Atlantic puffin is one of Britain's most beloved seabirds — instantly recognisable with its brightly coloured bill, upright posture, and comically efficient flying style. The UK hosts approximately 580,000–620,000 puffins, representing about 10% of the world population, with major colonies on Orkney, Shetland, St Kilda, and the Farne Islands. Despite their charismatic appearance, puffins face serious and accelerating threats from climate change, food availability collapse, and invasive predators — placing them on the UK Red List of Birds of Conservation Concern.

Life History and Biology

Lifespan: Up to 30+ years in the wild; long-lived for a seabird of their size
Breeding: Returns to colonies from late March; single egg laid in burrow (or rock crevice). Both parents incubate for ~40 days
Chick (puffling): Remains in burrow for 40–45 days; fed by parents carrying multiple fish in serrated bill. Leaves burrow alone at night to avoid predators
Winter: Spends entire winter at sea, far offshore in the North Atlantic
Bill: The bright orange/yellow bill coloration is seasonal — a breeding ornament. The bright plates are shed after breeding, revealing a duller winter bill

Feeding Ecology

Puffins are specialist fish hunters, diving to depths of 60m to pursue prey:

Primary prey: Sandeels (Ammodytes spp.) — small, oily fish critical to puffin chick survival
Secondary prey: Sprats, herring, capelin, and small gadoids
Bill adaptation: Puffins can hold multiple fish crosswise in the bill simultaneously (record: 62 fish in one bill), using spines on the tongue and palate to hold captured fish while pursuing more

Sandeel availability is the single most critical factor determining puffin breeding success. When sandeels are scarce (due to temperature-driven northward migration or population collapse), chick growth rates plummet and breeding failures cascade.

Conservation Threats

Climate Change and Food Availability

Ocean warming is driving sandeels northward, out of range of many traditional UK puffin colonies. At colonies such as Fair Isle and Shetland, breeding success has been near-zero in some recent years due to sandeel scarcity. This is the primary driver of population declines in UK puffins.

Invasive Predators

Rats and introduced mink devastate puffin colonies by predating eggs, chicks, and adults in burrows. Programme of Ratland (rat eradication on islands) and mink control are critical conservation tools — proven to deliver rapid population recovery when implemented effectively.

Bycatch and Fisheries Interaction

Puffins are caught as bycatch in gillnets and longlines. The scale of this mortality is poorly quantified but potentially significant at the population level.

Plastic Pollution and Oil Spills

Puffins, as pelagic winter birds, are exposed to marine plastics and oil pollution. Ingestion of plastic microparticles affects digestive function. Oil pollution kills through feather contamination, destroying waterproofing and thermal insulation.

Conservation Actions

Marine Protected Areas: Protecting sandeel fishing grounds around key colonies — particularly important in the North Sea
Sandeel fishing restrictions: Scotland implemented significant sandeel fishing restrictions in 2020; evidence suggests positive benefit
Island predator eradication: Projects on Shiant Islands and elsewhere show substantial puffin breeding improvement post-rat removal
Monitoring: RSPB Seabird Monitoring Programme tracks burrow numbers and breeding success annually

Birdwatching and Welfare Considerations

Puffins are remarkably approachable at breeding colonies and are a major draw for ecotourism
Maintaining respectful distance (3m minimum) prevents disturbance of burrow entrances and landing zones
Avoid blocking puffin flight paths with drones — photographic disturbance is a genuine welfare concern
Support RSPB and Seabird Recovery Partnership conservation work