A group of ravens near each other is called a “flight”. If a group is in the air and moving, it’s called a “chase.”
A “fledgling” or nestling is the young bird that has just hatched.
Since the number of people who have asked this question seems low, I’m going to answer Wylis’ follow up question: What are some quintessential behaviors of ravens? For her next New Year resolution challenge.
Ravens do many things simultaneously while engaging in what we call polysemous behavior, alternating between different means of achieving their goals depending on whether those actions provide more reward than alternative courses of action.