This is the tree under which Abigail found the Tawny Owl pellets. It's a horse chestnut in a small fenced enclosure on the northwest corner of the Diana playground. You can see part of one of the Orme Square Lodges at the far left of the picture.
It's an old tree and well provided with holes, but we couldn't see which hole Abigail was referring to.
Anyway, this is certainly a place to keep an eye on.
Update: Abigail says that it's the right hole. It faces roughly southwest.
The Little Owl at the Albert Memorial was looking down from her hole. From this angle you can see the split in the top of the branch, which is becoming increasingly rotten. It did, however, survive the recent gale, so it's not going to collapse immediately.
The Egyptian Geese at the Round Pond were in a protective mood, lunging at a Coot which had come too close while the goslings were drinking ...
... and chasing away a Carrion Crow, which posed a real danger.
Many crows from the large colony at the Round Pond are spending their days on the Parade Ground, where there is an abundance of worms in the newly laid turf. The trees on the edge of the Serpentine are full of them. Here one rattles crossly at another which has displeased it in some way.
A pair of Red Crested Pochards cruised around together on the Serpentine.
On the Long Water, a pair of Herring Gulls called affectionately to each other.
Unlike the Black-Headed and Common Gulls, which are now preparing to leave, many Herring Gulls remain and breed in London. One colony is on a flat roof in Church Street, off the Edgware Road.
A Grey Heron was wandering through a patch of daffodils beside the Vista. It was not having a Wordsworth moment. It was looking for rats.
A pair of Long-Tailed Tits were bouncing around in the trees below the Triangle car park.
There was also a Wren looking for insects in cracks in the bark.
The gorse blossom is attracting bees. This is a Buff-Tailed Bumblebee.
A Peacock butterfly was drinking nectar from a hyacinth in the Rose Garden.