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young bird; chick; fledgling
greenhorn; fledgeling; novice; rookie
卵からかえったばかりのひよこが元気に歩き回る。
The chicks that just hatched from eggs are walking around energetically.
ひよこの黄色いふわふわの毛が子どもに人気だ。
The yellow fluffy feathers of chicks are popular with children.
この業界ではまだひよこ同然の新人です。
In this industry, I am still a fledgling newcomer.