A Song Thrush near the bridge sang in an alder tree and then rested for a moment in the brambles.
A Blackcap was singing on a nearby twig.
A female Blackbird collected a twig for her nest.
A Chiffchaff sang from a treetop near the Round Pond. They usually choose high places to sing from.
Another Chiffchaff, maybe its mate, was bustling around in the brambles below.
A Great Tit posed grandly in a magnolia tree near the bridge.
Rose-Ringed Parakeets may be a pestilential nuisance, but you have to admit that this one looks rather fine in a camellia bush in the Flower Walk.
A Wren in the Rose Garden searched for insects in primula flowers.
The female Little Owl near the Round Pond looked out of her hole.
The Grey Heron was still on the nest at the west end of the island.
Under the willow next to the bridge a Great Crested Grebe enviously eyed a Coots' nest.
At the east end of the Serpentine a Mute Swan picked up twigs and threw them into a heap. I didn't see a potential mate anywhere near, but female swans get this instinct in spring.
However, the dominant swans on the Long Water are not yet showing any sign of wanting to nest.
The solitary Mandarin drake on the Serpentine flew over. Probably someone has started feeding him and he's getting expectations.