House Martins have started nesting in the ornate plasterwork of the Kuwaiti Embassy, just outside the park. There are never more than eight nests, but the colony has survived over the years.
The young male Chaffinch in Kensington Gardens is now behaving just like the older one, plonking himself down in front of me and calling to be fed.
A bold female Blackbird at the Round Pond stared at the camera. She was under the Little Owls' tree, but unexpectedly cold damp weather was keeping the owls indoors.
The male in the Dell was on the small rock in the stream, a favourite perch for all kinds of birds.
A Wood Pigeon fed in a blossoming Rose Acacia tree near the Rose Garden. It's eating the young leaves, not the flowers. This North American tree, Robinia hispida, is one of the many exotic species planted in the park in the 19th century. The park management are now only planting native trees, a safe but dull policy.
In the Rose Garden, a Great Tit perched on a yellow rose.
This is the mate of the tatty Blue Tit, a perfectly smart bird, in the pink hawthorn tree.
Both the Robins were also out. This means that either the chicks have hatched in the nest, or it's been predated by a rat. We shall have to wait and see.
A Starling fed the chicks in the nest in a tree hole by the boathouses.
A Pied Wagtail caught a midge on the edge of the Serpentine.
The Grey Heron chicks in the fourth nest on the island bounced and clattered frantically to encourage a parent to feed them. It didn't. They get large meals at long intervals, with no snacks in between.
The Mute Swans on the Long Water were feeding in the reeds next to a Coot's nest. They left each other in peace, in that odd truce that exists between these two aggressive species.
The swans at the boathouse have an egg. They are unlikely to nest properly. This site has never been successful.
There is a new family of Egyptian Geese on the south side of the Serpentine, with five goslings.
A Buff-Tailed Bumblebee collected pollen in a ceanothus bush by the Dian fountain.
Two excellent pictures taken by Duncan Campbell at the Wetland Centre. This is a Plain Tiger butterfly, Danaus chrysippus. It's a native of Africa, Asia and Australia, also occurring in n Spain, southern France and Italy south of the Alps, and heaven knows how it got here as the wind has been mostly northerly or northeasterly in recent days.
A pair of Common Blue damselflies mating.
Puzzled by the large deposit of Black Poplar fluff beside the Long Water, I looked for a tree and found a small one which seems unlikely to have generated that much of it. The fluff is the windborne seeds of the female tree.