A pair of Mute Swans on the Serpentine have hatched three cygnets, which mysteriously appeared today. I have no idea where the nest was -- probably screened by bushes on the island.

Meanwhile, the female swan on the little island in the Long Water stood up reveal the nest for a moment, and I could still only see one egg. However, others may be hidden by reed stems.

The Great Crested Grebes' nest on the Long Water is complete and occupied. This is a typical reed nest, larger than the scruffy platform made of mud and twigs that usually serves for grebes.

There seem to be two families of Reed Warblers, one at each end of the reed bed next to the Diana fountain. They are all flying about quite actively now. This young one was briefly visible while it was at the west end of the reeds, calling to be fed.

There was a Little Owl in the usual tree, well hidden but at least sunlit today. This looks like the female, with smaller eyebrows than the male, but it is hard to be certain in this rather indistinct shot.

I was just finishing walking around the south side of the Serpentine and about to go home, discontented with not having enough pictures, when I heard a Goldfinch singing from the top of a willow tree.

Underneath this tree there was a young Robin ...

... three young Pied Wagtails ....

... and a Treecreeper starting to climb up the trunk.

When I got home there was a Garden Warbler singing in some creepers on the house opposite, though I couldn't see it in the foliage.