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The eggs hatch after 14 days, and the chicks leave the nest a further two weeks later. The altricial chicks are naked and have their eyes closed for the first few days after hatching. [44] The chicks are fed earthworms, insects, and berries. Waste accumulation does not occur in the nest because the adults collect and take it away.
When the eggs are laid, the female will sit on them to keep them warm until they hatch, after about 18 days. Then both parents will help to feed the chicks. Young robins stay in the nest for about 23 days after hatching, but even after leaving the nest the parents will continue to feed them until they are about 65 days old.
Female birds are able to produce more of a certain gender of birds that are more likely to survive under extreme conditions. In birds, the females' egg determines the gender of the offspring, not the male's sperm. In zebra finches, a study showed the effect of food on gender ratio production. For females, egg production is a metabolically ...
Egg incubation is the process by which an egg, of oviparous (egg-laying) animals, develops an embryo within the egg, after the egg's formation and ovipositional release. Egg incubation is done under favorable environmental conditions, possibly by brooding and hatching the egg.
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The breeding season for golden bush robins in Pakistan is from May to June. The female birds tend to lay 3 or 4 eggs and their incubation period is 14 or 15 days. [3] The nests consist of compacted moss and grass that is lined with hair, wool, and feathers. [4] The lifespan of a golden bush robin is around 3.8 years. [3]