This spring, we found a bird’s nest in a tree made completely from horse farm materials:  strips from a blue tarp, horse hair and a few tiny twigs and leaves (which you can’t see) at the bottom, to give it structure.

I’ve done my best with my poor photography skills (why can my friend the photographer take amazing pictures with my Canon Elph and this is the best I can do?) but I wanted to show it to you.   It’s about a 3″ cube.

Any idea what species might have built it?