When do the egrets or white birds start roosting coming into the trees on Lake Palestine? I have heard you can catch lots of cats early morning under these trees that the birds are roosting in. Any advice on fishing under the birds?

I have a question. When you're under these trees/birds, do the fish you catch have worms in the flesh? The reason I'm asking is because, when I was crappie fishing back this spring I caught several crappie with worms in the flesh. I couldn't tell until after it was filleted. I would see these lil dark spots in the fillets at first I thought it was a bruise or something from the fish maybe getting finned from the other fish in the live well. Then I just happen to stick the tip of my knife in one and that's when I recognized these were worms (little long skinny & red). I posted this on the crappie page as well and the response I got was "this is a parasite the fish get from eating bird dropping". So I was just wondering if you guys see this in the catfish you catch when fishing under the trees with roosting birds?