will my birds cross

Question
i have a female bourke female and a male red-rumped parakeet in the same cage i dont want them to cross. but a friend tells me i shouls seperate them because they will cross breed. is this true

Answer
Bourkes are the only members of the Neophema family that lack the green feathering. They also have a slightly different body and tail shape, indicating that they might not be as closely related to the other Neophemas as we think. Although Bourke's make superb foster parents, they will not inbreed with the other grass parakeets such as the Red Rump.

Wayne