When it comes to the size of a cage for a parrotlet, there is really no such thing as “too big.” Parrotlets, like any other parrot species, benefit from having as much space as possible in their cages. The more room they have to move around and explore, the happier and healthier they will be.
Parrotlets are active birds and enjoy flying and climbing. They need space to stretch their wings, exercise, and explore their surroundings. A larger cage allows them to do all of these things more freely.
One important factor to consider when choosing a cage size is the bar spacing. Parrotlets are small birds, and the bars of the cage should be close enough together to prevent them from getting their heads or bodies stuck between them. Generally, a bar spacing of around 1/2 inch to 5/8 inch is suitable for parrotlets.
Aside from the bar spacing, the size of the cage should be determined by how much time the parrotlet will be spending in it. If the bird will be spending the majority of its time outside of the cage, a smaller cage may be adequate. However, if the parrotlet will be spending a significant amount of time in the cage, a larger cage is definitely recommended.
In my personal experience, I have found that providing my parrotlet with a spacious cage has greatly improved his overall well-being. He has more room to move around, play with his toys, and exercise his wings. I have noticed that he is more active and engaged in his environment when he has plenty of space to explore.
To summarize, there is no such thing as a cage that is “too big” for a parrotlet. The more space they have, the better. As long as the bar spacing is appropriate, it is always beneficial to provide a parrotlet with a larger cage, allowing them to fully enjoy their surroundings and engage in natural behaviors.