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.
Female pet monk parakeet. The nominate subspecies of this parakeet is 29 cm (11 in) long on average, with a 48 cm (19 in) wingspan, and weighs 100 g (3.5 oz). Females tend to be 10â20% smaller, but can only be reliably sexed by DNA or feather testing.It has bright-green upperparts.emale pet monk parakeet. The nominate subspecies of this parakeet is 29 cm (11 in) long on average, with a 48 cm (19 in) wingspan, and weighs 100 g (3.5 oz). Females tend to be 10â20% smaller, but can only be reliably sexed by DNA or feather testing. It has bright-green upperparts.