Well it depends on the breed of parakeet. I have 2 budgies and they are very adorable. They even mated. They can live to be about 15 if well cared for. They can fly if allowed and will be loving companions forever if you love them in return. They are generally ment to be kept in pairs, but if you want your own companion, you should keep them single. It isn't good though to keep a single parakeet if you are busy and he/she doesn't get enough attention. I tryed keeping them alone and they got very stressed out and we wound up putting them back together. For little birds I personally think that they eat A LOT. Their seed is kind of costly too if you get good, healthy brands. We have 2 budgies so buying seed is a big cost. If there are any other questions that you may want to ask you may e-mail me at firstname.lastname@example.org.