Would you rescue a displaced fledging bird or leave it be?

A strong windy day blew down some fronds from our palms and we’ve found a fledgling starling bird in our bushes. He doesn’t seem to have had any parent birds visit with food, he can’t fly but otherwise seems undamaged.

I want to feed him and keep him safe from animal attacks until he can fly by himself and find his own foods but my mother thinks he should be left in the bushes. What say jellies? I found some online advice on what starlings eat in the wild and what household foods we can substitute in the meantime but I welcome your advice and experiences.