re: Question for OT Ornithologist. Black birds and White birds on the LSU lakes.

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Predator looking up into the light will see the white and it will blend in to the light providing camouflage. A predator looking down from above will see the black which will blend in with the ground or water below providing camouflage. This is similar to how fish have white bellies and dark backs.

Seems to be a mutually beneficial roosting arrangement.

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Excellent hypothesis, but I'm not sure a predator would confuse an egret with a star at night. Perhaps it would work when the moon is bright, however.