Moving with the Tide

At dawn, the tide is out and the birds are dispersed across the wide mudflats that stretch north from Shellness past Leysdown-on-Sea to Warden Point. This is some 5 square kilometres of sands filled with worms and molluscs. There are perhaps a 1,000 birds out there; mostly black-headed gulls, oystercatchers and black-tailed godwits with smaller…