My new budgie Cosmo, who I got two weeks ago, is tame and rides around on my shoulder sometimes. Earlier when I went to the kitchen to make some lunch he started squawking and chirping. He was in his cage and he's done this once before. He doesn't ever do this when I'm in the room, and the first time I thought he was just talking to his mirror.
It's rather normal for budgies to become vocal when they're comfortable in their surroundings . He can also be calling for you, since he is tame. It may be that he is becoming bonded to you. They also make their various noises when they feel good, as an alarm to alert 'the flock' of potential danger, playing, etc. You'll find that he will start doing it also regardless if you're in the room. Some budgies are more vocal than others, but overall I find that budgies are a very vocal species of bird.
The chirps and squawks in this case, since you were leaving the room, were indicative that he missed you, as his "flock" and wanted to make sure you were still around. When my girl "flock calls" for me, I give her a whistle to let her know where I am and she usually quiets down
How cute that you and Cosmo have such a special bond already!
and Princess Mallorn!
Thank you to Deb for her wonderful Faery magic
Totally normal behavior. Think of it as stretching when you get out of bed. They're just getting ready to do something. Whether or not it means anything has to be taken in context with the bird's behavior. When they are scared, they puff up a bit and are quick to run away from you. Some birds have more of a fight response to fear and will shake their tail, pin their eyes, and open and shut their beak as a clear warning (usually a hen).
Once they are well tamed, they still stretch when they see me, but will do my favorite speedy side step to the side of the cage to beg for millet. They're not stupid, they know who has the good stuff. They all run from my 4 yr old though...lol. Have fun taming that bird!
Budgies are also more vocal around noon by nature. Mine like to sit and sing, sometimes squawking. They have a few peak times in addition to noon, including late morning and dusk. I love the soft songs the males come up with. If your bird is solo, he will call all the time whenever you leave because they are social animals that live in enormous flocks in the wild. Being alone isn't a good thing to them. I would whistle back as others have suggested and leave a soft radio channel going if you are leaving the house for a bit. Have fun!
So I've noticed Cosmo sitting by the mirror almost all day. The mirror is quite large and its attatched to desk, and his cage is on my desk. The mirror reflects his enitre cage. He sometimes tries to climb the bars of the cage seemingly to try and get to his reflection.
I've taken him out of the cage and noticed he tries to peck and stare at it.