Injured Jackdaw

I wondered if I could get some advice. We have a pair of jackdaws visit our garden for food and yesterday found one of them with what appears to be a broken wing. It's very lively and moving about in our trees, coming down for food and water. It's really difficult to catch but just wondered what we should do, as it must be in some pain. Its partner was with it yesterday, not sure where it was most of today as we couldn't see it and the other jackdaw was also looking for it but then it just appeared this evening for food and water and is now back in the uppermost part of our tallest tree.