There are mommy birds and daddy birds. And when they reeeeeally love each other...
Do you mean zed*?
*ducks and runs*
* I always wondered why Zed in Pulp Fiction was Zed and not Zee. weird.
If you have to ask the question, it's entirely possible the answer will make no sense. (In fact since you posted it here, it's quite probable that it won't.)
Why?
Chicken thigh.
What, chicken butt?