American Flamingos??

They are Chilean
EDIT: Sorry, I thought they looked like Chileans but now agree with Chlidonias they are American

Are you sure?

Because Birdworld lists both Chilean and American on Zootierliste (Aswell as Greater but I know they weren't these ones).

they're Caribbean (American), not Chilean. All the flamingoes are reasonably easy to distinguish by the patterning of the bill (depending on the quality or aspect of the photo, of course).

Looking on google, I can see that the beak on the right bird is definitely an American. However, the left bird doesn't appear to have the deeper pink bit on the beak in any of the photos (so I don't think it's lighting). Could they be mixed together?

it could be. There's a lot of black on the bill too. But otherwise it looks like a Caribbean.

Enclosure for Chilean flamingoes at Birdworld, 20 June 2010 | ZooChat

This photo on zoochat also states chilean, its the same exhibit.

From now on, im taking phtos of signs :/