A Carrion Crow killed and started eating a young Wood Pigeon by the Queen's Temple. A crow will kill and eat anything it can get, but I think this bird must have been injured and vulnerable before the crow struck.
An already bloody day was made worse by finding Pigeon Eater in the act of killing a Feral Pigeon in his usual place at the Dell restaurant.
He carried it off into the lake. His youngster, who had been leaving him in peace for the last two days, couldn't resist coming over and whining for a share.
But no share was available. After Pigeon Eater had eaten his fill and gone off a young Herring Gull seized the carcass and took it away while the young bird followed unhappily.
The dominant Black-Headed Gull was also cross, as a couple of Canada Geese had landed on his platform and gone to sleep.
A Grey Heron found a fishing station on some reeds in the Long Water which had been trampled flat by the Mute Swan family ...
... who were playing under the bridge.
A pair of Gadwalls ate algae on the edge of the Serpentine. Since a fair number of them settled on the lake they have become much less shy, and you can go right up to them to take a picture.
There were two Great Crested Grebe chicks on the west side of the island.
The family on the east side have reached the stage where one parent looks after each chick.
A Moorhen with two chicks was feeding at the Vista, under a bush where they probably nested. Their nests are always well hidden.
Theodore photographed a Spotted Flycatcher at Peter Pan, a real find as it's a very infrequent visitor to the park ...
... and also a Willow Warbler, of which there are only ever a few here.
There was a Chiffchaff in a hawthorn near the Buck Hill sheleter, where they are often seen ...
... and a Wren.
This ornate creature on the railings at Peter Pan is the caterpillar of a Vapourer moth, Ogyia antiqua. It climbed to the top, probably thinking it was on a tree and there would be some leaves to eat, but was disappointed and came down again.
The Rose Garden yielded a couple of routine but gaudy pictures, a Buff-Tailed Bumblebee on an Indian Blanket flower ...
... and a Common Carder on a Michaelmas daisy.