Egrets - French Guyana (1 Viewer)

[Gduff]

I've just looked at very old photos from French Guyana (that I've taken on july 2001).
Is it possible to ID these birds?

The one in flight must be Tricolored Heron ; so as the dark one?
What about the white Egret? Snowy Egret?
eBird indicates there are also Little Egrets there, but it seems there is yellow color on the bill

Thanks

 

[THE_FERN]

We can't be sure of ids because of image quality, but the egret is great egret. It's actually slightly larger than the presumed tricolour heron---the latter is stretching its neck