We discovered a hummingbird this morning in the kitchen office, huddled up and catatonic. It probably got in there last night and was unable to get out. I just read that hummingbirds have to consume their body weight in food (nectar and insects) each day and they have to stock up before nightfall to survive until the next day. When facing starvation, they are able to lower their body temperature.
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.