Sometimes they don't sing until the females arrive. When you hear your first robin sing, search the neighborhood for females. In some places you can see flocks of migrating robins feeding together and hear local territorial birds singing at the same time. Weather and food availability can influence the number of days between the arrival of the first male arriving and the first female. Sometimes the first females appear with the first big wave of robins.
Robins usually build their first nest of the season in an evergreen or on a building.
The second and third nests are usually in a leafy tree or on a building. Nests are put in places where the babies will be safest. 96 K file. 138 K file. 184 K file.