This one was close to expiring and when we picked it up, it didn't move. We started feeding it sugar water and warmed it under a lightbulb. Pretty soon its tiny tongue flicked out and it started swallowing. Its eyes, which had been closed, opened. After maybe 5 minutes, it started moving its wings. Back from the dead. We took it outside and—zoom!—off it went into the highest birch tree—jubilation from the humanoids.
In these photos you can see it with its eye closed, and later, open.