Taking a short break while looking for raptors out over the Dee estuary at Parkgate, we took the dog for a short walk and happened across a largish group of (maybe 20) birds running about and feeding in a grassy field. They turned out to be redwing, easily identified by the reddish underwing.
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As is suggested by their shape and patterning, redwings are distant relatives of thrushes. These would be winter migrants to UK. According to Wikipedia, they often form loose flocks of tens or even hundreds of birds in winter, often feeding together with other types of bird. We did notice a few starlings mixed in with them.