I became aware I never saw the bird nest in the lilac bush on the border of our driveway.  I looked at the nest and realized it came from a smaller bird than a robin.

Fifteen feet away a scarlet tanager nested in a box for the second year in a row although I only saw it once or twice but I never noticed the other nest.

And wondered what kind of bird was it and why did I miss it only mere steps from our front door?  Why was I that preoccupied that I did not spot the nest?

That seems to happen every year:  deciduous trees reveal their nests after they are stripped of leaves.  I always wonder why I did not spot the nests even when they are nearby.