It's not what you think

I posted this photo previously, but captioned it as a birdhouse built inside a steer skull. Upon closer inspection, I've discovered that's not what it is at all.

It is a steer skull, that much is true. From the size of the horns and the small caliber bullet hole showing prominently in the forehead, I can tell you that it was a yearling and I know that it came from the San Felipe Ranch, where I used to live. Clearly, we were unable to doctor it back to health, and had given him the common and permanent .25 solution.

You can see a bony structure inside the skull that runs vertically down its length, effectively separating it into 2 halves. That bone is what changes the complexion of the previous caption; "bird's nest."

Here is the nest inside, housing 3, tiny, light-blue eggs, but that's not the unexpected part.

Here is the nest on the other side of that central bone, which also protects 3, tiny, light-blue eggs. You see, it's not a skull at all. Complete with common wall, it's a condo! I wonder if they have an HOA?