Bird cages should be large enough for your bird to spread its wings, flap them around, and to walk around in peace. Don’t forget that you will position other elements inside, so make sure there is room for everything. Food and water bowls will be placed inside, along with perches, swings, and toys. It is better to purchase a larger cage, otherwise you will notice your companion starting to get depressed, to scream, bite, and pluck feathers.