No scientific research has been done to show whether a bird can develop ADHD, but it should be kept in mind that birds’ brains function differently than those of humans. If your parrot has the above symptoms, he is probably just being a bird.
Parrots are flock birds and tend to be happiest when they share their world with feathered friends. Although different species would not usually intermingle in nature, they often learn to accept one another in captivity. However, parrots can also be territorial or moody, and the size difference between Amazons and conures does demand precautions like separate cages and supervised playtime.