There have been several broods of House Sparrows here. This seems to be the latest with just one youngster.
Junior sat on top of the the Green Man's head. Maybe the spiky hair reminded it of the nest. Mum spent some time hunting around for any insects. House Sparrows are very agile. They can hover for short periods and easily cling to rough vertical surfaces:
Most of the time mum watched while dad fetched bits from a nearby peanut feeder:
Blenheim Palace - Part 2
8 hours ago