The River Wey at Thundery Meadows, a frosty morning on Surrey Wildlife Trust's wetland reserve, Elstead, Surrey, England, United Kingdom, Europe

Mute swan pair, Cygnus olor, courting at Martin Mere Wildfowl and Wetlands Trust nature reserve, Burscough, Lancashire, England, United Kingdom, Europe

Mallard with duckling (Anas platyrhynchos), Martin Mere, Wildfowl and Wetland Trust Reserve, Burscough, Lancashire, England, United Kingdom, Europe

Mallard drake (Anas platyrhynchos), stretching wings, Martin Mere Wildfowl and Wetlands Trust Reserve, Burscough, Lancashire, England, United Kingdom, Europe

Whooper swans (Cygnus cygnus), flying at sunset, Caerlaverock Wildfowl and Wetland Trust, Dumfries and Galloway, Scotland, United Kingdom, Europe

Barnacle geese (Branta leucopsis) in flight. Caerlaverock Wildlife and Wetlands Trust reserve, Dumfries and Galloway, Scotland

Robin, Erithacus rubecula, on twig at Martin Mere Wildfowl and Wetlands Trust reserve in Lancashire, England, United Kingdom, Europe

A frosty morning on Surrey Wildlife Trust's wetland reserve, The River Wey at Thundery Meadows, Elstead, Surrey, England

Nene, Branta sandvicensis, Hawaiian goose with goslings, captive at Martin Mere Wildfowl and Wetlands Trust reserve, Burscough, Lancashire, England, United Kingdom, Europe

Female mallard (Anas platyrhynchos), stretching wings at Martin Mere Wildfowl and Wetlands Trust reserve, Burscough, Lancashire, England, United Kingdom, Europe

Whooper swan (Cygnus cygnus) flying down on to the water, Welney Wildfowl and Wetlands Trust Reserve, Norfolk, England, United Kingdom, Europe

Wigeon, Anas penelope, at Martin Mere Wildfowl and Wetlands Trust reserve in Lancashire, England, United Kingdom, Europe

Whooper swans (Cygnus cygnus) on the water, Welney Wildfowl and Wetlands Trust Reserve, Norfolk, England, United Kingdom, Europe

Mute swan, Cygnus olor, Caerlaverock Wildfowl & Wetland Trust reserve, Dumfries & Galloway, Scotland, United Kingdom, Europe

Female mute swan, Cygnus olor, and her cygnet in Southrop in the Cotswolds, Gloucestershire, UK

Female mute swan, Cygnus olor, and her cygnet in Southrop in the Cotswolds, Gloucestershire, UK

Man and child on ferry, Delhi, India

Whooper swans (Cygnus cygnus) and mixed duck flocks at Martin Mere, a Wildfowl and Wetlands Trust bird reserve near Southport, Lancashire, England, United Kingdom, Europe

A captive red breasted goose (Branta ruficollis) at Martin Mere, A Wildfowl and Wetlands Trust bird reserve near Southport, Lancashire, England, United Kingdom, Europe

Whooper swans (Cygnus cygnus) and mixed duck flocks at sunset at Martin Mere, a Wildfowl and Wetlands Trust bird reserve near Southport, Lancashire, England, United Kingdom, Europe

Common goldeneye (Bucephala clangula) at Martin Mere, a Wildfowl and Wetlands Trust bird reserve near Southport, Lancashire, England, United Kingdom, Europe

Mixed flocks of wildfowl being fed with grain at Martin Mere, a Wildfowl and Wetlands Trust bird reserve near Southport, Lancashire, England, United Kingdom, Europe

Red-breasted goose (Branta ruficollis) group approaching on land, captive, WWT Slimbridge, Gloucestershire, UK.