Juvenile Greenfinch or Adult female

Currently looking after this poorly bird found in the garden today. Possible a window strike as when found it appeared dazed and had its eyes closed and barely flinched when I picked it up, plus it can't perch.

It's safe in a cage with food and water and has perked up a little so will see how it is in the morning.

I've had a canary so not unfamiliar with finches but hoping this one will recover.