According to a now defunct (English) website Centralpets.com, animal species kept as pets can be rated on a scale of one to three according to their tendency toward aggressiveness versus friendliness or ability to be easily handled. read more
So you’ve decided you want to bring a feathered friend into your family. Great idea. As a newcomer, you'll do well to choose one that's friendly. While temperament varies from bird to bird, a handful of domestic parrot breeds -- most small to medium-size -- are typically more friendly than others. read more