A loud ticking noise from a bush next to the Vista revealed one of the Cetti's Warblers scolding some invisible predator. It was so furious that it forgot to be shy of humans and stayed in sight for half a minute. Here it is in full cry ...
... and during a quieter moment.
Apart from that it was a very ordinary day, though pleasantly sunny. The rowan tree on Buck Hill was visited by several Mistle Thrushes, a Redwing ...
... and the usual crowd of migrant Blackbirds.
A flock of Long-Tailed Tits was going around the Serpentine.
One of the colony of Wrens near the Italian Garden came out on a twig for a few seconds.
On a Long Water, a pair of Great Crested Grebes were displaying, and one of them went into the 'cat posture', with wings outspread as if enclosing a huge brood of chicks on its back.
This pair has been displaying quite a lot, especially on sunny days. It doesn't mean that they will start nesting at an inappropriate time. These rituals are enjoyable for their own sake, and strengthen the bond between the pair.
The Black Swan was wandering around on the Lido with the speckled Canada-Greylag hybrid goose. He left it in peace, even when they were competing for some food that was being thrown to them.
His girlfriend, or perhaps one should now say ex-girlfriend, was right at the east end of the Serpentine, also being fed by a visitor.
A Cormorant had caught a perch near the bridge.
This Black-Headed Gull with a black plastic ring, code P762, is a visitor from Lithuania, the second one I have seen recently. I couldn't get the whole code on its metal ring, but it ends with 6.442.