Sanderling
Calidris alba
Tap image to enlarge · Wikimedia Commons
Overview
The Sanderling is the small white wader that chases the waves up and down Formby Beach. It feeds at the very edge of the surf, running up as a wave breaks to pick invertebrates exposed by the water, then retreating as the next wave comes in. In winter plumage they're pale grey and white — almost pure white in bright sunlight. They breed on the high Arctic tundra.
At a Glance
| Order | Charadriiformes |
| Family | Scolopacidae |
| Habitat | Sandy beach · Surf zone |
| Diet | Small crustaceans, sand hoppers, worms exposed by retreating waves |
| UK population | Around 15,000 wintering birds; passage numbers much higher |
| Sefton Coast | Common winter visitor to Formby Beach; tens to hundreds of birds |
| Conservation | UK Amber List |
Where to See It
Formby Beach and Ainsdale Beach. Runs along the surf line chasing waves.
Identification
Small wader. Very pale grey and white in winter. Bright orange-buff and black in summer. Runs fast along surf. Bold white wing bar in flight.
Viewing & Photography Tips
Just walk along the beach at Formby — they're usually there in winter. The wave-chasing behaviour makes them easy to spot.
Conservation Status
UK Amber List
This species is on the UK Amber List for Birds (BoCC5), indicating moderate concern. Population monitoring and habitat management remain important for its continued recovery.
Frequently Asked Questions
Why do Sanderlings run in and out with the waves?
Sanderlings feed on tiny invertebrates — sand hoppers, small crabs, worms — that are exposed by breaking waves at the surf line. As each wave retreats it uncovers food; the Sanderling dashes in to pick it up before the next wave arrives. This characteristic wave-chasing behaviour makes them one of the easiest waders to watch on Formby Beach.
Related Species
Plan your visit to the Sefton Coast
Marshside RSPB, Formby pinewoods, Ainsdale NNR — practical guides to getting there, what to bring, and the best spots for each season.