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Fauna · Mablethorpe, Lincolnshire, United Kingdom

Grey Seal Pupping Season — Donna Nook Lincolnshire

Donna Nook National Nature Reserve on the Lincolnshire coast hosts England's most accessible grey seal pupping colony — up to 2,500 pups born on the dune and mudflat system from November through December, with the viewing area positioned along the dune fence within 5 metres of nursing mothers and their white-coated pups. The colony's expansion from 13 pups in 1974 to 2,500 in recent years represents one of Britain's great conservation successes, and the scale of the pupping season — white pups covering every mudflat visible from the viewing walkway, bulls fighting in the surf, mothers nursing and calling — creates one of the English coast's most overwhelming wildlife spectacles. The RAF Donna Nook bombing range immediately behind the colony (active for 11 months of the year but closed during pupping) gives the colony the undisturbed quality that has allowed its extraordinary growth.

When
Nov — Dec
Best viewing
A walk along a dune fence brings you within five metres of hundreds of nursing grey seals and newborn white pups, with bulls fighting in the surf — England's most intimate large-scale wildlife spectacle, accessible in all weathers.
Category
Fauna
Status
Returns Nov 2026

About this spectacle

Standing at the dune fence at Donna Nook in late November or December, you are within five metres of nursing grey seal mothers and their white-coated pups — close enough to hear the rasping calls, the suckling, and the thunderous bellowing of bulls competing in the surf. White pups carpet every mudflat visible from the walkway, their rich milk-fat smell mixing with salt wind off the Lincolnshire coast. Hundreds of mothers and their newborns rest on the dunes while massive bulls scar each other in slow, lurching battles at the water's edge. The scale is extraordinary: up to 2,500 pups born within weeks, concentrated in a compact area that places visitors almost inside the colony rather than observing from a safe distance. The contrast between the raw, noisy wildlife drama and the flat coastal dune landscape — the old bombing range visible immediately behind — makes the setting utterly unique. Morning light picks out the white pups against dark mudflat; overcast winter days give the scene a wild, elemental quality.

When to go

Nov — Dec

Getting there

Nearest airport: HUY. Nearest city: Grimsby.

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