During parakeet reproduction, the male stands on the back of the female, tucks his tail beneath hers, and rubs their cloaca together to stimulate ejaculation. This process fertilizes the eggs that the female lays.
In the wild, parakeets typically require a hollow space such as a log or a hole in a tree for breeding. Parakeets and other members of the parrot family rarely have an open nest.
If parakeets are bred in captivity, they need a nesting box to simulate the protected atmosphere they use in the wild. This box needs to provide containment on multiple sides rather than be exposed.