What size cage is best?
When it comes to small, more flighty birds like Finches and Canaries it’s generally true; The bigger the better. Keeping a pair in a large flight or aviary is more room than they really need but they will definitely get plenty of exercise. There are no set size guides. It’s best to look for a cage that will allow your birds to fly from perch to perch. There are many cute little cages which most pet stores will tell you are perfect for finches, but I don’t agree. They are cute, but too small. The few small cages I have, I only use to hold birds temporarily if they become sick or injured. If you plan to house several types of finches in an aviary, then one cubic foot of space per bird is recommended. Slightly larger birds will need a little more space. Also not all species should be housed together because of the various temperaments of the species. Take time to learn about how your bird may react to another species before you add a new species to an aviary.