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A modern egg incubator. An incubator is a device simulating avian incubation by keeping eggs warm at a particular temperature range and in the correct humidity with a turning mechanism to hatch them. The common names of the incubator in other terms include breeding / hatching machines or hatchers, setters, and egg breeding / equipment. [1]
The humidity is also critical, because if the air is too dry the egg will lose too much water to the atmosphere, which can make hatching difficult or impossible. As incubation proceeds, an egg will normally become lighter, and the air space within the egg will normally become larger, owing to evaporation from the egg.
The eggs are creamy white to pale buff, and measure 24 mm–28.4 mm × 18.4 mm–22 mm (0.94 in–1.12 in × 0.72 in–0.87 in). Incubation takes 16–18 days in the wild and 21–22 days in captivity, and is done only by the female. After the eggs hatch, the male helps guard and raise the chicks. [7] [8]
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Three days before the eggs are scheduled to hatch, they are moved into a hatcher unit, where they are no longer turned so the embryos have time to get properly oriented for their exit from the shell, and the temperature and humidity are optimum for hatching. The eggs will hatch during a period that is often referred to as the hatching window ...
The eggs are incubated by the female alone beginning after all the eggs are laid. The eggs hatch synchronously after 17–20 days. The young are precocial and shortly after hatching leave the nest and can feed themselves. They are cared for by the female who broods them while they are small.