as long at it was safe to shoot at, you certainly could have
but there is also nothing wrong with leaving it for the other hunters to try and flush again!
most pheasant hunters I think will have more issues with hunters that set up waiting for them to drive things towards them, using them as drivers like in a deer drive!
and them someone shooting at things they flush, in there direction,
that to me is POOR sportsmanship as well as a safety issue!
but seen it happen many times in my life time!
had BB's rained on me a few too many times!
I personally hunt as far away from others as I can , as I sadly know there are many bad /unsafe hunters out there!