Propably not. Hand-reared bird rarely get along vety well with any bird, even if it's his own specie. Even if cockatiel and conure weren't hand-reared, their size-different is too big: conure can easilly kill small-beaked cockatiel.
Fancy green-cheeked conure are majestic parrots that are easy to care for. They eat fruits legumes, sprouts, grains, and vegetables and need to spend time in the sun every day.
Birds are not mammals, but it should be possible.
That's what they do to express themselves. Maybe they need to be cuddled, maybe something is too loud, maybe they want to get out of their cage.
the amazon
Could be a Green-Cheek Conure.
Assuming it wasn't there before, it could either be a Benign(non-cancerous) or Malignant(cancerous tumor) tumor or something of the other. I'm no veterinarian, but seriously think you should get your petchecked out by an avian veterinarian.
One way to tell if the Patagonian conure is male or female is by looking at the birds head shape. A female conures will have soft round head while a males head is more flat. Most female conures have pink feet while males have grey feet.
The Green-cheeked parrot's habitat is found in South America, in the forests of Mexico, Brazil, Bolivia and Argentina.
Green cheeked parakeets are currently not endangered. Most likely because there is strong enough numbers and no hunting.
a jaguar
They eat fruit
3000-6500!