Everybody's gonna have a good time!
I watched this House Wren building a nest in a box at Voorhees State Park in Hunterdon County, NJ today. Interestingly, he didn't want to use the official nest entrance hole, but insisted on going in and out of the more protected ventilation hole at the top right above the "real" nest hole!
The Pygmy of Fort Whipple
22 minutes ago