Enormo-finch

The other day I noticed a juvenile greenfinch under the feeders that had clearly been on the pies:

you

fat

knacker

Now I know first winter birds of many species are larger than their parents - I believe the tactic focuses on the theory that juvenile birds need larger fat reserves to get them safely through the tough times of winter because they're amateurish at feeding and stuff but I've personally never seen such a big Greenfinch!