Two Spotted Flycatcher nests!

We discovered that we had two Spotty Fly nests today, on the front and back of the house. We knew about one; the other was a surprise when I had to go up onto the roof and found the nest in the end of the gutter (left) - I hope it isn't washed away.  A quick online search indicates that these birds are usually monogamous, but we'll have to keep a careful eye open to check.