Many native cavity-nesters - including this Black-capped Chickadee - will nest in an artificial birdhouse, or nestbox. Look for a nestbox that's plain wood. If the birdhouse comes with a perch, remove it. It just makes it easier for a predator bird to land and go after the eggs or young. Here's the important part: the entrance hole should be 1-1/8 inches. No more, no less, exactly 1-1/8 inches. That size will let native birds in, and keep non-natives out. Now hang the nestbox out of the way of predators. You can buy a nestbox - or build your own! Learn more at BirdNote.org.