Eurasian wigeon
Over 10,000 wildfowl and 20,000 waders winter on the estuary. These include dark-bellied brent goose ("Branta bernicla"), Eurasian wigeon ("Anas penelope"), ringed plover ("Charadius hiaticula"), black-tailed godwit ("Limosa limosa"), and pied avocet ("Recurvirostra avosetta").