On the subject of birds in captivity - not sure how it is in your country, but in Australia we're only permitted to keep birds which have been bred in captivity. And even then, we have very strict rules as to size of enclosure, etc. Our budgie (budgerigar) was bred in captivity, plus there are no wild budgies in this part of the country. If they get out, they get killed by a lot of predator birds in the area. In fact, we have to even be careful putting the cage outside, because we have Currawongs (like crows) and Butcher Birds which will reach through the bars after a pet bird.
Our budgie is at the moment perched in my bathroom. She likes it there. We change her seed and water etc when she is out of her cage; she's never been good with being handled. She won't attack, though, not at all. To get her back into her cage - most times she puts herself there, but if we've forgotten her and find her dozing late at night on the curtain rail, she's usually too sleepy to bite. Also too sleepy to fly properly, which looks very funny, like watching a drunk stagger home from the pub.
Generally we can herd her back to the cage and she will go in.
But she doesn't squawk, budgies make a number of sounds but the most common one is a short chirp that sounds like small bells being jingled.
I remember back in my uni student days we went bird banding. This involved arriving at the site just before sunrise, for a day of capture, tag and release. The mist nets were designed for small canary-sized birds and we had to work quickly to get them out of the net and to the desk for measurement and data recording. After finally being given a leg band, we released the birds (away from the nets!) and by about lunchtime we packed up the nets and left.
About halfway through the morning the bloke in charge ran into the data recording area with both hands bleeding, clutching a Crimson Rosella. He'd been right beside the nets when TWO birds had flown into them, the birds so busy arguing with each other that they didn't see the nets. If he'd not been there, the birds would have ripped the nets to pieces and then flown away; he grabbed one in each hand. Then they bit. Powerful beaks! he had to let one go, so he could protect himself and still have at least ONE bird to measure. He was so excited, he didn't seem to care about the blood running everywhere.
That bird got royal treatment - it even got a nectar feed before we released it, it was fascinating watching the brush tongue lapping away. I did wonder if it continued arguing with its mate when they met up again...
Marg