Seven Islands Pond: Greylag x Canada Goose

More mixed up in large

I went for a brief, socially-distanced walk with a friend on Mitcham Common in the chilly early afternoon. I saw four bunnies before my pal arrived, but didn't get a clear shot of any of them...
This is the pretty hybrid goose on Seven Islands Pond; it has the ruched neck, pale beak and feet, and the (mid-Atlantic?) honk of a greylag, but the contrasty markings (most obviously the head, neck, and tail) of a Canada goose.

Others here (or right from Long-tailed tit)