Nuthatches are aggressive. They'll dart at anything that lands on the table while they're feeding. All the other small birds defer to them. It's that rapier-like beak that does it. They're the musketeers of the small bird world.
Blue tits use their claws to hold larger items of food steady while they nibble.
Species seen this morning at the front of the house:
Greater Spotted Woodpecker
I'm particularly pleased about the Jay.