| Incubation lasts 10 to 15 days and the altricial chicks are brooded for about 5 to 6 days after hatching. |
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| Moreover, chicks of precocial species generally require less parental care than those of altricial species. |
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| The brown pelican produces a relatively large chick at a relatively high cost compared to other, smaller altricial species. |
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| Competition between siblings for resources is widespread in the broods of altricial birds. |
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| In altricial birds the chicks depend entirely on their parents for food and protection. |
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| The altricial chicks are fed primarily insects, beetle larvae, grasshoppers, spiders and small lizards. |
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| In passerines, altricial nestlings possess brightly colored gapes and engage in vigorous behavioral displays directed toward a feeding parent. |
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| Because anis have altricial nestlings, the provisioning help of all breeding adults is essential. |
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| Their altricial cubs are born in mid-winter, with their eyes closed, and weighing only about 0.6 kg. |
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| In addition, the amount of food altricial nestlings receive from their parents varies depending on how much food is in the environment. |
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| After hatching, the altricial nestlings are brooded for 1 to 2 weeks depending on the weather. |
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| Other avian species, however, would also be acceptable for testing, especially altricial species. |
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| The altricial young are fed semi-digested fish by both parents. |
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| Once, the human was considered an altricial species and cared for accordingly. |
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| The most significant modification in humans compared to other extant primates is altricial birth, which is the birth of helpless newborns. |
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| The altricial chick is brooded for 2 weeks and fully fledges after 70 to 75 days. |
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| The altricial state is typical for squirrels and mice, while the precocial state usually occurs in species like guinea pigs and porcupines. |
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| Females with altricial young typically build elaborate nests before they give birth and maintain them until their offspring are weaned. |
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| They are altricial that is, they are helpless and require complete parental care and they are also nidicolous that is, they remain in the nest for some time after hatching. |
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| Hence, in multi-brooded altricial species, the timing of family break-up appears to be an adaptive reproductive decision maximizing lifetime reproductive output. |
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| The post-fledging period of altricial birds is recognised as a main bottleneck in survival, and therefore many selective processes are likely to operate at this stage. |
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| The compromise made by evolution was for humans to deliver their young in a relatively altricial state. |
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| Rabbits, carnivores, and most rodents bear altricial young. |
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| A guide to nestling development and aging in altricial passerines. |
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| The incubation period of sixteen or seventeen days is followed by the hatching of altricial young which are brooded by the female alone for the next twelve to thirteen days. |
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| Fledglings of altricial species begin to make independent decisions of movement and need to select habitat that minimizes risk of predation and optimizes thermoregulation. |
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| First, humans are altricial, with immature newborns and a long childhood. |
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