I just imagined the birds as tenants and the trees as their landlords. I pictured a Carolina Wren flitting around a tree, asking if there were any spots available. To that, the tree answered silently. But the wren could hear the tree's reply and then flew to the available nesting spot, and examined it before flying away in search of nesting materials. 

I imagined woodpeckers as the noisy neighbor that no one really likes, and crows as the creepy neighbor that no one wants to have. The kind of neighbor that makes the other birds' feathers stand on end and makes their little, brittle bones tremble.

It made me smile.