What's the difference between fledgling and unfledged?

Fledgling

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Definition:

Example Sentences:

Unfledged

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Definition:

• (a.) Not fledged; not feathered; hence, not fully developed; immature.

Example Sentences:

• (1) From the moment of hatching the unfledged chicks are brooded by their parents until they are able to maintain their own body temperature.
• (2) The communities developed rapidly in unfledged gulls and the diversity parameters were of similar magnitude in immature and adult birds.