A Grey Heron was biting twigs off waterside plants on the Long Water near the bridge, suggesting that it was thinking of nesting. It was too far away for a picture, and flew up the lake before I could get to it, and when I caught up with it on the Vista it was just scratching its head in an ordinary way.
On 10 January, in the London Bird Club Wiki, Des McKenzie reported a heron carrying nesting materials on the Serpentine. The herons' nests on the Serpentine island are well known, and one of them produced young last year. But one on the Long Water would be a new development. Some years ago a wooden platform was built in a tree near the Vista in an effort to encourage herons to nest, but none of them used it and it seems to have fallen down now.
The Bearded Tits are still in the reeds near the Diana memorial fountain.
From several photographs I managed to get at least a partial ring number for one of them: L50928 (the 8 might be a 6). But I don't know how many digits there are on the 'A' size rings used for these little birds.
Someone reported seeing a small grey goose with an all-white head on the Serpentine, and I walked round but didn't find it. Several years ago an Emperor Goose, an escape from a collection, was a frequent visitor to the Serpentine, and this would have matched the description. But it died some time ago.
Returning to more familiar birds, a Wren was poking around in leaf litter near the bridge. It was nicely camouflaged against its brown background.
And a Pied Wagtail was hunting for insects along the edge of the lake.
As usual, it was very shy and flew away if approached, quite unlike the bold bird running around on the pavement at the north end of Queensway, which was seen again only yesterday morning.