A birdhouse
A birdhouse was a hand-crafted wooden object hung outside to house birds.
In the holographic re-creation of a farmyard aboard the Caretaker's array, a birdhouse hung behind the bench in front of the house. (VOY: "Caretaker")
In 2381, there was an Aurelian couple that lived in a large birdhouse in a tree in the aviary of Starbase 25. Their birdhouse was knocked out of the tree when a high-speed kart-chase occurred in which the station's security were pursuing Ensigns Beckett Mariner and Brad Boimler. (LD: "An Embarrassment Of Dooplers")