My German grandmother (now 95), whose parents hail from what was Prussia used to sing this song to us kids when we were little (I am now 35).

I happend to Google the lyrics to see if I had remembered them correctly and found your post along with about 10 versions of the song. My version was not to be found, I thought I would share it with you:

My pigeon house I open wide and let my pigeons free
They fly about from every roost and land in the tallest tree
And when they return at the end of day
I shut the door and I say goodnight

Coo, coo, coo, etc.