Spotted eagle owl (Bubo africanus) at nest box, Paternoster, Western Cape, South Africa, Africa

Bluetit bird feeding hungry young nestling in a garden bird box, The Cotswolds, Oxfordshire, England, United Kingdom

Bluetit hungry young nestling bird cheeping in a garden bird box, The Cotswolds, Oxfordshire, England, United Kingdom

Bluetit bird feeding hungry young nestling in a garden bird box, The Cotswolds, Oxfordshire, England, United Kingdom

Bluetit hungry young nestling bird awaits feeding in a garden bird box, The Cotswolds, Oxfordshire, England, United Kingdom

Great Tit holding an insect in its beak rests on a bird box, England

A gift shop in Port Stanley in the Falkland Islands with a British telephone box.

Chicken in a box carried by a motorcycle, Sangue, Maranhao, Brazil, South America

A collection of colourful bird boxes in Hveragerdi, Iceland, Polar Regions

A collection of colourful bird boxes in Hveragerdi, Iceland, Polar Regions

Boreal Owl or Tengmalm's Owl (Aegolius funereus), looking out of nest cave

Boreal Owl or Tengmalm's Owl (Aegolius funereus), looking out of nest cave

Little owl (Athene noctua), young bird looking out of the entrance of the nest box, Muensterland, North Rhine-Westphalia, Germany, Europe

Wedding planning with rings gift boxes

Tawny owl (Strix aluco) flies at night with a yellow-necked mouse (Apodemus flavicollis) in its beak to the nesting box, North Rhine-Westphalia, Germany, Europe

Colourfully painted bird house at the Rosenheim 2010 State Garden Show, Rosenheim, Bavaria, Germany, Europe

Nest box for insects, insect hotel, courtyard, St. Martin Church, Weismain, Upper Franconia, Bavaria, Germany, Europe

Bird nesting box on a wooden telephone pole

Bird nesting box on a wooden telephone pole

Barn Owl (Tyto alba), young in nest box hissing, Rio Grande Valley, Texas, USA