Thank you, Wurzel, Goldie and David. I tried for better pictures of the kingfisher a couple of days ago but inadvertently used the online tide tables for Woodbridge California instead of Woodbridge Suffolk (curiously, there is a Woodbridge in California and a California in Woodbridge). So Minnie and I got down to the river at 08h47 on the dot only to find extensive mud under the kingfisher's bush!

We'll try again ...
It's either been too cloudy or far too cold (today!) for any chance of butterflies on the wing here so I've been turning my camera on birds instead.
Whistling wigeon are a winter feature of the Deben. It is a very smart duck:
Black-headed gulls are still in full winter plumage, but clearly dreaming of spring ...
Here are two perky ringed plovers with a dunlin:
This black-tailed godwit was going deep!
And here a distant group of avocets. This species breeds in lagoons along the coast - at Minsmere, for example - but winters on the mudflats:
Temperatures had dropped to 1°C by the time I went on my evening walk with Minnie and will doubtless dip below freezing tonight, with a clear sky:
Guy