Common buzzard , looks to be soaked tail an£ primaries probably just low in weight wet and unable to fly , as said i5 will eat anything meat wis3 and worms , feed it some beef keep it somewhere dark and warm so it can dry off and rest , don’t want it flying around nocking it’s self up , give it couple days then let it go will be fine as long as no broken bones , if it’s been shot with lead will be dead soon so if got young uns best not letting th3m check on it ??