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In altricial birds the chicks depend entirely on their parents for food and protection.
The altricial young are fed semi-digested fish by both parents.
Their altricial cubs are born in mid-winter, with their eyes closed, and weighing only about 0.6 kg.
After hatching, the altricial nestlings are brooded for 1 to 2 weeks depending on the weather.
In altricial species, the parents of hungry nestlings may be helped in feeding and guarding their young by other adult birds who have not bred that year.
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