Before she can lay her eggs, the female robin, with help from her mate, builds a nest from twigs, mud and dried grass. Nest-building takes the robins two to six days. The entire action, from constructing the nest to new robins hatching, may take between 17 and 27 days. A pair of robins will often nest two or three times in a season, starting the work from strike by building a new nest each prison term.

Laying the Eggs

The female robin lays one small bluing testis each day to a entire of three to five eggs. She feeds on earthworms in the good morning in order to ensure that her body has the energy to handle the physical demands of laying an egg. Until all eggs are laid, she may limit the time she spends sitting on the nest. This is to keep the older egg cool so that the entire clutch develop at roughly the same time. Until the eggs start to hatch in approximately two weeks, the beget rarely leaves the nest for more than five or 10 minutes at a clock.

Incubation

The mother robin must keep the eggs at a healthy temperature to ensure that the embryo develop normally. A robin ‘s body temperature is approximately 104 degrees and is kept firm by the insulating property of feathers. For the eggs to receive soundbox heat more directly, the mother robin develops a brood eyepatch. This is an area on her belly where the feathers have fallen out, exposing the naked skin. In cool weather, the mother presses the grizzle patch against the eggs to warm them with her body heating system. In hot weather, the female will keep the brood while covered by the long, out feathers, lessening the degree of heat the eggs receive. She may even shade the eggs with her wings to keep them aplomb. During the brooding time period, the female regularly moves the eggs around the nest. To do this, she stands on the rim and turns the egg with her bill. Rotating the eggs helps maintain an even temperature and keeps the embryo from becoming to stuck to the shell.

Hatching

After 12 to 16 days, the eggs are ready to hatch, normally one each day in the order they were laid. Like most birds, the chicks use an egg tooth – a astute hook at the goal of the beak – to poke a hole in the shell. The summons of hatching can take an stallion day, as the dame must rest sporadically from the exhausting clamber to free itself of the blast. newly hatched robins are naked and blind, weighing less than a quarter.

Leaving the Nest

The nestlings are fed up to 40 times a day by both parents. At approximately 13 days old, they are ready to leave the nest. More than one-half of all robins do not survive their first base year, destroyed by predators that include the domestic vomit. Those birds that do survive will be ready to raise their own unseasoned the follow spring and are likely to live another five to six years.

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