Meanwhile, last month, a porpoise had to be helped back out to sea after getting stranded on mud flats in the Humber Estuary.

It started with a trip to the River Dee Estuary by wildlife cameraman Simon ... Our shallow seas and high tidal range create rich mud flats packed full of crustaceans and shellfish - high energy ...

Pacific oysters have been found in every estuary on the south coast of Devon ... Mr Slater said: "We have really important mud flats and soft muddy shores that are vital for wading birds as ...