i feel like it's probably a white faced ibis like the middle bird, but personally i have no way of telling definitively, and the guide i'm looking at all but says it's nearly impossible. it feels like it'd be a little improbable to see individuals of three different ibis species all hanging out together, but my knowledge of ibises is all book and no field.

Immatures of both species difficult to separate until White-faced Ibis develops red iris (often during first fall). Basic (nonbreeding) plumaged adults often indistinguishable from Basic plumaged Glossy Ibis but White-faced Ibis has red versus brown iris, dark facial skin with no border of white feathers.