Hi, so I have noticed a little dark grey/blackish lump which has appeared under my polar blue parrot. At first I thought it was some poop which was stuck, but now since I've observed some kind of agressivity (towards one of my blood parrots) which was not noticeable before, I'm thinking about an egg tube maybe ? So here are pics below, I am worried and I don't want any thing to happen to my Bejo. Please could you identify what it could be. I have also noticed that the polar blue parrot can go into the blood parrots hiding spot without being pushed out. Could it be a mating behaviour ?