
All of a sudden, now there are hungry youngsters to feed, it is being attacked from above and below.
As well as the inevitable Starlings there has been the occasional visit from a Rook to attack it from above:

A bit of jittery video, hand held looking through the kitchen window which was in full sunlight:
The attack from below is from a Blackbird:

He flies straight up, grabs a beak full and drops down again.

I have watched Blackbirds use the same tactic to grab the berries from ivy hedges when there is no place for them to land on the plant.