Mars: Hellas Planitia. The largest visible impact crater in the Solar System is Hellas Planitia on Mars, a giant depression with a floor over seven kilometres (4.3 miles) below the Martian surface.
Dimensions. The recommended size for one parakeet is 25 inches tall and 25 inches deep. To house two birds comfortably, you should double that cage size to make it at least 50 inches tall and 50 inches deep.If you can afford it and have enough space, opt for a bigger cage.all cages work best for parakeets. This type of bird really likes to fly around and hop from place to place. If you can, choose a cage that exceeds the height recommendation of 50 inches.
Warning. Territorial or stressed budgies may not stop at biting one another and pulling feathers. They can also extend their territorial behaviors to you. Simply opening the door may cause a stressed parakeet to bite you. If your birds have been fighting, approach the cage slowly and never take the bird out.Instead, allow your budgie to step out onto your hand. Most territorial budgies are quite docile outside the cage.onsiderations. Fighting is more likely to happen when you introduce a new bird, rather than between birds that have known each other a long time. Introduce new budgies outside the cage, or in their own separate cages. Open both cages to let the birds get to know one another.