Common Shelduck

Seen one? Add it to your free UK BirdedexHear its song and see the mapFree, no app download. Uncommon bird: +3 points when you log it.

Common Shelduck in the UK

A resident and winter visitor found around most of the coast. The UK holds about 7,850 breeding pairs (2016) and around 51,000 wintering birds. Both are falling: breeding numbers dropped by 27% between 1995 and 2024, and the winter count by 20% between 1998 and 2023. The range has grown, though, as pairs have colonised inland gravel pits and reservoirs. In late summer most adults leave to moult, many on the German Wadden Sea. Amber listed.

Where and when to see a Common Shelduck

Any large muddy estuary will have them: the Wash, the Humber, Morecambe Bay, the Mersey, the Severn and the Thames among others. RSPB Snettisham, RSPB Titchwell Marsh and WWT Slimbridge all give close views. Numbers peak in midwinter. From late spring look for broods of striped ducklings, often gathered into large creches. In July and August most adults are away on moult, leaving the young with a few minders. Low tide is best, when birds spread across the mud to feed.

Habitat, diet and field notes

Habitat: Estuaries, mudflats.
Diet: Molluscs, shrimps.
Field note: Goose-sized duck; pied with chestnut band.

How to identify a Common Shelduck

Larger than a Mallard and smaller than most geese, with a goose-like upright walk. It looks white at a distance with a dark head and neck, which are glossy green up close. A broad chestnut band wraps the breast, a dark stripe runs down the belly and the wing tips are black. The bill is bright red, with a swollen knob at the base on spring males, and the legs are pink. Juveniles are grey-brown above with a white face and no breast band.

Call and song

Males give soft, high whistles, mostly in spring. Females have a fast, nasal, laughing 'ak-ak-ak-ak-ak' that carries across the mud, often in flight. Heard something you cannot place? Bird Hear identifies UK birds from a 10 second recording, free in your browser.

Confusion species

• Northern Shoveler: A drake Shoveler also has a green head and chestnut and white body, but the chestnut covers the flanks and belly and the bill is huge and dark.
• Ruddy Shelduck: Ruddy Shelduck is orange-chestnut all over with a paler head and a black bill.
• Egyptian Goose: Egyptian Goose is brown and buff with a dark eye patch, and shares only the white forewing in flight.

Related guide UK winter wildfowl.

Conservation status and Birdedex points

In the Birdedex the Common Shelduck is an Uncommon tier bird, worth +3 points when you log one. It is Amber-listed in Birds of Conservation Concern 5, the middle level of concern in the UK.

Recent UK sightings

Similar birds

• Ruddy ShelduckEpic · Lakes
• Bar-tailed GodwitUncommon · Estuaries
• Grey PloverUncommon · Estuaries
• Black-tailed GodwitUncommon · Wet grassland
• Brent GooseUncommon · Coastal mudflats
• Common GreenshankUncommon · Bogs (summer); estuaries (passage)

Common Shelduck: quick answers

What does a Common Shelduck eat?

Small invertebrates sieved from wet mud. The tiny mud snail Hydrobia is the staple on many estuaries, along with small shrimps, worms and other molluscs. Birds feed by sweeping the bill from side to side as they walk, leaving zigzag trails on the mud.

What habitat does the Common Shelduck live in?

Estuaries and sheltered muddy coasts above all. It nests in holes, often old rabbit burrows in dunes or banks, and sometimes under buildings or in hollow trees. Inland pairs use gravel pits, reservoirs and river valleys, a habit that has spread since the 1960s.

When is the best time to see Common Shelduck?

Winter for numbers, when flocks gather on the big estuaries. Spring for display and pairs prospecting burrows. Early summer for creches of ducklings. Late summer is the quiet spell, because adults go abroad to moult and are flightless for a few weeks.

Kit that helps

Best spotting scopes for UK birding. Affiliate links, our own picks, no extra cost to you.