In a study published by the journal Science, it was found that female budgies prefer intelligence in a mate.
In experiments, select males were trained to open a box containing treats. Other males were not. The females were able to choose between males who could open the treat boxes and males who could not. The females overwhelmingly chose the males who could solve the puzzle, even if they had previously been passed over as mates.
Actual mating was never observed – so it is not clear whether the new male were chosen by the females to mate with or were just to be friend zoned. You can read more about the study here.
The Birds of Mura Mura Aviary at the Pairi Daiza Zoo and Botanical Gardens in Belgium.
The large outdoor aviary of Mura Mura is a faithful reproduction of the natural environment of the budgerigar.
In the arid and sub-arid regions of Australia, budgies travel together in groups of up to 4,000 birds. Wandering swarms follow the rain as the desert briefly blooms. Grass germinates very quickly to be able to grow new seeds and the grass seeds and fleeting water puddles are exactly what these birds are looking for. Seeing them in flight in the upper areas of the aviary is a truly exotic experience. The birds of the wild variety are all green, and the blue, white, and yellow variants are obtained through mutation during breeding in captivity. Export from Australia is strictly forbidden, but reproduction in captivity is very easy, and as a result the supply surpasses demand. More than 200 bird species inhabit the exterior and interior of the birdhouse. Pink cockatoos, king parrots, cockatiels and more all share the habitat of our parakeets. – from the Pairi Daiza website
The aviary was built at the start of the 17th century and at one time housed rare birds (such as peacocks, swans and ostriches). The aviary is located in the Villa Borghese Gardens, part of the former private estate of the Borghese Family (and now public park).