This is a photo I took in January, is that early for "summer" plumage?...
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I have seen several today in the Cardiff bay and NONE had full black hood some were in an intermediate state
a few showing the chocolate brown heads, most not.
Well this was the only one at the Hampstead pond, which is why it caught my eye. I have since had a quick look in t'internet and found an interesting post here;
I had one in my local flock (100-200 strong) showing full adult plumage in early January this year.
There is usually one or two early ones.
Lat/Lng: 51.594, -0.169
OS grid ref: TQ269899