Local wildlife rehab, or if you don't have one near you, you can call animal control and they will catch it and take it their for you. Could you post a picture? But wait.... what do you mean by UNDER the shed.

There is a bird under my shed and he has been there all day. Looks like a blue jay to me. He's calling out for help I assume, and it's making me and my mom sad. He looks to have been attacked by something. His feet are fine, it's his back wing that is messed up. He is going to die from starvation and lack of water from my perspective. I was curious if there was anyway we could help him. I'm also worried about his talons which I saw on him. I don't know what to do...