It's a juvenile Black Redstart. Good to see as they are scarce and it means they have bred probably fairly locally. Where abouts did you see it.
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Tony
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I’m on The Wirral, it was just in my garden. I’ve never seen any Redstart here before, only get the usual sparrows and blue tits etc. Thank you for the I.D.
Ironically, Black Redstarts although not common in this country, are often found in urban/semi-urban locations.