A male Bewick's Wren (Thryomanes bewickii) carrying a stick to a nest. Although it appears he won't get the stick through the opening of the house, he did eventually succeed.

It is the male that begins construction of the nest, often more than one, with the female making the final decision as which of his nests she likes. Once she decides, the female will complete the nest and lay four to eight white eggs with brown markings. Then she incubates the eggs for 12 to 14 days. After hatching, the fledgings are fed by both parents for a period up to a fortnight. A pair of Bewick's Wrens will have two, occasionally three broods each year.

After the Wren pair raised their brood and abandoned the birdhouse, the photographer cleaned it out. Surprisingly, beside the usual feathers, sticks, grass clippings and animal hair, the female Wren had also used pieces of plastic garbage bags and Wal-Mart shopping bags in constructing her nest.