noun, masculine/wa.zi.jɔ̃/plural: oisillons
young bird; chick, fledgling, baby bird, little bird
“Au pied du hêtre, j’ai trouvé un oisillon qui était tombé de son nid.” — At the foot of the beech tree I found a baby bird which had fallen from its nest.
From Old French oisel + -illon.