The American robin (Turdus migratorius) female chooses a nest site, usually on one or more horizontal branches in the lower part of a tree. In certain areas robins will build their nests on the ground, on cliffs or on buildings.
The robin nest is built from the inside out. First the female robin presses dead grass, feathers, twigs or moss into a cup shape. The cup is then reinforced with soft mud to create a strong, sturdy nest. Finally the cup is lined with fine, dry grass.
Three to five sky blue eggs without markings incubate for 12 to 14 days. The helpless, naked chicks, covered with sparse whitish down, remain in the nest for 13 days before fledging. Robins can have up to three broods in a year.
The female robin sleeps on her nest during the summer, while males gather at night in roosts. The fledglings, once they become independent, join the males at the roosts. Only after the female is finished reproducing for the year does she join the males and juveniles at the roosts.
This robin nest is located in a cottonwood tree next to our house in Lookout CA (Modoc County). One photograph shows the chicks shortly after hatching, while the second picture was taken two days later.