Condors that eat too much at one sitting may wait several hours on the ground or a low branch nearby before they can take off again. They are also tidy - after a meal, they clean their heads on grass, branches and rocks. Condors nest in caves and overhangs on cliffs that have a clear approach for easy take-offs and landings. They may bank the egg with gravel and debris, but don't build a true nest. Condors have also nested in large cavities in the trunks of giant sequoia trees.
Condors have a low reproductive rate.
They don't breed until they are 6-8 years old. Nesting condors lay only one, four inch long egg in late winter or spring. If the egg is lost however, they will lay another one. The parent puts the egg on top of its feet to incubate it, and both mother and father take turns caring for it. After about fifty-six days, a white downy chick hatches.