Urgent answers needed please?

I have a Blackbird in a cage in my garage because I found her today. She cannot fly,but she is o.k because she has been eating and drinking. O.K. I rang the wild life hospital and they said that they could collect her,but that was 4hrs ago and no one has arrived.(I can not get hold of them now) Will she be o.k. in the garage overnight.(I dont want to bring her in because I have pet birds and she might be ill. What should I do please?