My Cookie used to scream CONSTANTLY!! It's awful. What time does Birdie go to bed? For me bringing in a routine completely stopped the problem. Same bed time every night.
It seems like it's because he wants to be with his flock (you). My two will scream for me if they know i'm in the house, and i find that calling to them makes it worse because it conforms to them that i'm here but ignoring them.
But calling back to Birdie might work for you.
It seems like it's because he wants to be with his flock (you). My two will scream for me if they know i'm in the house, and i find that calling to them makes it worse because it conforms to them that i'm here but ignoring them.