Put a heat lamp and a towel on the tank. A bird in shock needs to be very warm. The closed eyes, puffiness and panting are signs of shock. I think that cloth MUST be cut off or even yanked off, because wild birds have about zero chance in captivity. Then, place the bird in a protected area (maybe your back yard?) under a bush to give it the best chance for survival. It will starve itself in captivity.