Thanks for your advice, I wish it was flock calling but its definitely not that. Ive been watching him and spending lots of time with him the whole 2 months and theres no pattern to his screaming he just does it randomly. He does talk though! he has a few things he likes to say Ive been trying to reward him when he's making sweet noises or talking so Ill focus more on that. I might try using veggies to distract him too!
Also I don't cover his cage as a punishment, he only gets covered at night to sleep