Baby Yellow Warbler

Not sure at what point birds are called a juvenile, but he could fly.
(nestling, fledgling, juvenile, immature, young, etc. )

Hey, this could be papa, a little further down the trail.

Do the males/fathers stick around at this stage, I don't know.
The mama was right there by baby, of course, just didn't get a pic of her.

enature
cornell

cornell glossary
Nestling - A young bird after hatching and before leaving the nest.
Fledgling - A young bird that left its nest but is not yet able to survive on its own.
Juvenile - A young bird, typically one that is recently fledged and has not attained its full adult plumage.