Before you go out to buy a bird cage there are several points worth remembering to ensure both you and the bird can live in harmony. The first thing to decide is not the size of the cage but where the bird cage is going to be located in your home. This is often overlooked but is important nevertheless. It is far better to pick the location first and then pick your bird cage based on the space you have decided upon.
Although your bird cage should be away from windows and drafts it is important that it sees sufficient natural sunlight during the course of the day. The bird cage should also be in sociable part of your home to encourage your bird to interact with the day to day activity at your home. However, next to the TV would also be considered to be a poor choice.
So now you are ready to buy your bird cage and of course, you must consider the size of your bird. It is always advisable to buy the largest bird cage possible that your budget will allow. If your bird cage is too small your pet is likely to suffer psychological disorder leading to unwelcome behaviour such as screaming and feather plucking. For example, a bird such as a canary requires a bird cage of at least 40cm in length (50cm plus, if you have a pair of canaries).
Another important point is the space between the bars, particularly for smaller birds. Ideally the bars should be vertically spaced by no more than 1cm. This will prevent your bird from attempting to squeeze through the bars and getting stuck. Larger bird owners should buy a bird cage with horizontal bars as this will allow the bird a means of climbing providing good exercise.
It is also considered that rectangular bird cages provide more space than circular ones.