Now we know that these are ducks (thanks to the lovely Dawn for the confirmation), I can stop calling them waterfowls. Actually, a little Googling would make the answer quite obvious: ducks and geese have such different beaks.
These were taken on the same roll, on the same day as the Barbie exhibition I went to and you can see that the color shifts are so much stronger in daylight. The tones are green to a point of absurdity!
Ferrania Solaris 100 (expired), Zenit TTL