Corn Crake

You need to take it to a rescue centre where they are trained to look after them.

my cat captured him and brought him home, has a broken wing

Are you able to tell us more about this spotting, by completing the Description, Habitat and Notes field as per our FAQs at http://www.projectnoah.org/faq
The English spelling is Corncrake and in Spanish it is Guión.

Can you give us some information on this spotting? Looks like the bird is out of its natural habitat.