We have a bird guest also, Jon; a young Barred Owl is staying here overnight. Early in the morning we'll deliver it to the bird rehabbers.
The little hummer we delivered a few weeks ago was too badly hurt to make it, but a recent Broadwing Hawk was successfully released in time for this year's breeding season.
We're part of a sort of avian underground railway that links volunteers to deliver injured birds to licensed, thus legal, care. Best of luck with your crow visitor.