When Thomas Dambo begins a new artwork, he has the birds of Copenhagen in mind. The street artist makes colorful birdhouses that decorate trees and homes in the bustling Danish city. 

Originally trained as a carpenter, Dambo began using his woodworking skills to make plywood birdhouses after observing how much of the material is wasted at construction sites. With an emphasis on using recycled materials, he also works with paint donated to the project.

Dambo finds creative ways to install the houses. Since there was no tree available for the birdhouses shown here, the artist simply built a tree for them. His houses are so cozy that once a family of birds moves in, they rarely leave the nest.