birdhouse
A small box-shaped house where wild birds build nests.
A birdhouse is a small shelter built for wild birds to nest in, usually mounted on a pole or hung from a tree. Think of it as a cozy wooden box with a round entrance hole, designed to give birds like bluebirds, wrens, or chickadees a safe place to lay eggs and raise their babies.
Building a birdhouse is a classic woodworking project. You need to get the details right: the entrance hole must be the correct size for the birds you want to attract (too big and predators can get in, too small and the birds can't enter), the wood should be untreated so it doesn't harm the birds, and you need small ventilation holes near the top so air can circulate. A good birdhouse also has drainage holes in the bottom in case rain gets inside.
People sometimes call birdhouses nest boxes because that's their real purpose: providing a protected spot for nesting. In spring, you might watch a pair of birds carrying twigs and grass into your birdhouse, building their nest inside. If you're patient and quiet, you might eventually hear the high-pitched chirping of baby birds waiting to be fed. The satisfaction of knowing you created a home that helped new birds come into the world can make all the careful measuring and sawing worthwhile.