Caja nido (house made of wood for birds)

Paseando por las Marismas Blancas me encontré esta caja nido, me llamó la atención que estuviera hecha con una caja de Farias. Hola, ¿hay alguien en casa?

I was going for a walk in the White Marshes and suddenly I saw a little house for birds, it was on a tree and it was made with a box of wood, a typical cigars box you can find in a Tobacconist´s. It was peculiar for me.

Hello, is anybody at home?