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1. Remaining in the nest after hatching until grown or nearly grown. Used of a bird.
2. Sharing the nest of another species of animal: nidicolous mites.
nidicolous(of young birds) hatching in a relatively undeveloped stage and remaining in the nest for the fledging period. Songbirds are nidicolous.
said of a bird that does not leave the nest for a long time after it is hatched.