The Tawny Owl season is not quite over yet. The male and one owlet were visible in the trees in front of the nest tree, and the male called to his mate and was answered from another tree. One does not often hear these birds in daylight.

Several pairs of Chaffinches were flirting with each other in the blossoming trees, a most ornamental sight.

The Mute Swans on the Long Water, after spending a while persecuting geese, returned to the place where they had built their nest originally and lost their eggs to a fox. But they may yet have the good sense to settle for somewhere else.

A female Mandarin showed up on the Long Water with her mate, who then chased away the other two male Mandarins that were there.

Great Crested Grebes were eating the larvae of aquatic insects (perhaps mayfly) on the Long Water. Near the Serpentine island, a grebe caught and ate a crayfish. This is the first crayfish I have seen in the lake since the incident on 13 October 2008, when workmen cleaning the Diana fountain accidentally released algicide into the lake and killed thousands of them. Their return is not welcome: they are American signal crayfish, an invasive species.