Lay an Egg!
does Mother Robin lay just one egg a day? Carrying more than one egg
in her small body would be like an airplane trying to fly with too
much weight on board. One egg is just right.
Mom lets the eggs stay cool until all of them are laid. Then she starts the babies
growing. She keeps the eggs just the right temperature. She spends about 50 minutes
of every hour sitting on the eggs. Her body heat keeps the eggs warm in cold
weather. It shades and cools them in hot weather.
Most robins lay 3 or 4 eggs for their first nest of spring. Second and third
nestings of the season may have just two eggs.