1.  fledgeling(n = noun.person) entrant, fledgling, freshman, neophyte, newbie, newcomer, starter - any new participant in some activity;
is a kind of beginner, initiate, novice, tiro, tyro
has particulars: enlistee, recruit

2.  fledgeling(n = noun.animal) fledgling - young bird that has just fledged or become capable of flying;
is a kind of young bird
Derived form adjective fledgeling₁

   fledgeling(s = adj.all) fledgling - (of a young bird) having acquired its flight feathers; "a fledgling robin"
Derived form noun fledgeling₂

1.  a new member of a group. [WordNet 1.5]

2.  A young bird just fledged. [1913 Webster]