fledgeling

Adjective

• (of a young bird) having acquired its flight feathers
  • a fledgling robin
    

Noun

• young bird that has just fledged or become capable of flying

• any new participant in some activity

Related words

• Synonyms: 
  fledgling(a) , fledgeling(a) , fledgling , newcomer , starter , neophyte , freshman , newbie , entrant