Nestling (noun)

1. A young bird that is not yet fully feathered or able to leave the nest.
2. A small or young animal that is sheltered or protected.
3. A small or delicate item placed in a sheltered or protected location.

Origin:

The word 'nestling' is derived from the old english word 'nestlian' which means 'to settle or rest'. it refers to a young bird that is still in the nest.

Examples:

1. The nestling was still dependent on its parents for food and warmth.
2. The nestling was so young that it had yet to open its eyes.
3. The nestling was delicate and needed special care and attention.
4. The nestling was the smallest of all the young animals in the litter.
5. The nestling was placed in a warm and cozy bed for the night.