The Great Crested Grebes nesting on the Long Water are busy feeding their young. Here a parent hurries along with a newly caught fish

and offers it to a ravenous chick.

They are quite good at managing to feed their chicks in turn, and often you see them dodging the one that has been fed last time as it rushes forward for more.

The Moorhens in the Italian Gardens have three brand new chicks.They are quite well hidden in their clump of water plants, but you can see two of them in this shot, with the beaks of two parents gazing proudly at their offspring.

Meanwhile the indefatigable Coots are busy building their third nest.

A quick trot around the lake after the disruption of the Olympic triathlon showed that most of the Greylag and Canada Geese and Mute Swans have sensibly left. Some are on the Round Pond, others completely elsewhere. The two families of Great Crested Grebes can't go, and were both at the island. I only saw one of the two younger chicks, but it is too early to give the missing one up as lost, because it could just have gone behind a one of the plant baskets. Grebe chicks do wander around a bit, before being recalled by the loud voices of their parents, which carry over hundreds of yards of open water.

Here, in the reeds near the outflow of the lake, is a Six Spot Burnet Moth, Zygaena filipendulae. Male Burnet Moths have a peculiar habit of mobbing pale-skinned, red-haired people, who smell to them exactly like a female Burnet Moth.