On a windy day, the Black-Headed Gulls flying upwind over the Serpentine were stationary, or even going backwards.

Carrion Crows enjoy strong winds, and swoop around wildly in the gusts.

The pigeon-eating Lesser Black-Backed Gull claimed another victim. The actual snatch took place behind a Mute Swan, and this picture was taken a few seconds later. The gull didn't carry the pigeon into the water to drown it, and evidently killed it by biting through its spinal cord.

I am pretty certain that when I first saw this gull killing pigeons he did drown his prey, so he has learnt a new and more effective technique.

This young Herring Gull on the south shore of the Serpentine was engaged in a milder activity, playing with a snack packet in an exciting shade of orange.

A few yards away, the older of the two Great Crested Grebe families from the Long Water were fishing together. One adult in winter plumage is framed by two young birds. They were cooperating amicably, though there was a brief spat when one of the young ones lunged at the same fish as the adult, causing them both to miss it.

A Cormorant was fishing near the Lido, hauling up smallish fish from near the bottom of the lake so that they came up draped in weed, which had to be discarded. It managed to separate the two with great speed, and I was lucky to get a picture with a fish in it.

The Black Swan, undaunted by his defeat yesterday, was harassing some Mute Swans in the Lido swimming area. This is cordoned off by buoys, with just one way in at the east end, so he was herding them into a corner and obliging some of them to go onshore.

A pair of Pied Wagtails were running around the grass near the Triangle car park. This is the female, distinguishable by having a grey back. Males have black backs.

I was wrong about our Teal being female. It's an immature male. The ginger and green feathers of his adult plumage are just beginning to come through on his head, and are more noticeable now than when he arrived several days ago. There is also some new black and white vermiculated plumage on his side, under the green speculum of his secondary feathers.