Flamingos appear in Trailer 2 - briefly, in flight, in the wetland sequence. It's a small frame but it tells you something. Rockstar's environment art team isn't just shipping the headline animals; they're shipping the visual signal of Florida ecology too.
We keep this one short. For the wider wildlife list, see the wildlife page.
What Trailer 2 shows
Pink flamingos in flight, against a wetland backdrop. The frame is brief. The model quality is consistent with the rest of the wildlife frames - fully animated, not a poster.
Whether flamingos appear in flocks, whether they have ground behaviour visible to the player, and whether they're tied to specific wetland sub-regions are all unconfirmed.
Why flamingos matter as a signal
They are the most cliched animal you can put in a Florida frame. Rockstar including them isn't subtle - it's a deliberate visual hand on the 'this is Florida' table. The same trailer makes the Everglades reference, the Keys reference and the South Beach reference; flamingos belong with them.
The other thing it tells you is that the wildlife system isn't gameplay-only. Flamingos in flight are not a threat to the player. They are scenery animals with proper animation. That bar - scenery wildlife done well - is one Rockstar has hit before, in RDR2 specifically.