Yeah I know but where I heard about the Pionus they are behaved naturally no training needed.

I doubt it. Jessi said earlier that she's having trouble taming her Pionus.

Oh

I wish, Brandon. Dudley is a complete troll.

I'm sure they probably are well behaved when tame and all that, but unfortunately that's not the case with Dudley.
But according to my parents, he used to be very sweet.

I'm trying to fix his behavior problems. I think it's like every other parrot, where they can be great when treated correctly.

Did he just get less attention and end up like that? Tiko was very sweet too but then wasn't really handled as my mam lost trust in her after being bitten on the lip and Tiko lost trust in my mam and is now a little afraid of hands but will step up sometimes.

No, that's not it. I honestly don't know what turned him into a grumpy old man. I'm thinking they did something he didn't like, and it just escalated from there. I'm trying to reverse the bad habits he's developed over the year.

First things first, I need to teach him to play with toys, since that's something he never learned to do, and in result, he screams and throws all of his food out of the cage whenever he gets bored or angry. I'm hoping that teaching him to play with toys will help that somewhat, at least.

Budgies and cockatiels are considered to be pretty much domesticated. Maybe lovebirds too, but I'm not sure about them and didn't bother to look it up. Humans have been breeding them for quite a few decades now, and it only takes about a year for babies to turn into breeding adults so there have been a lot of generations. The individual birds that get along the best in captivity also tend to be the ones that have the most breeding success in captivity, so breeding a lot of generations gradually causes changes in the character of the birds even if you're not trying to breed for any particular trait.

The breeding of the larger parrots hasn't been as widespread and their turnaround time is longer. Until about 20 years ago it was easier to import wild-caught birds than to breed the large parrots. So they're a lot further removed from domestication than the popular small parrots are.

I wouldn't say lovebirds lol.

Lovebirds are an aggressive species but that doesn't mean they aren't considered to be domesticated. The wild ones are probably worse lol. Cattle and dogs are domesticated, but bulls are dangerous and some dog breeds are aggressive.

Here's an article by a well-known avian vet who says peach-faced lovebirds are highly domesticated and have been bred for over a hundred years: http://www.susanclubb.com/pdfs/pchf.pdf There are 9 different lovebird species and some of them are rare in captivity, so the rare ones wouldn't be considered domesticated. But at least one of the common species is, and maybe more.

I thought there are only normal greys in Australia in the wild.