And he does. A wild bird should have the sense to come in out of the rain, especially a woodpecker who has a nice snug little birch house he's made right in our backyard.
I have more reason to be concerned about rain than the average duck, because their first rainstorm can be a bad scene for the orphaned baby birds I care for. I've had some (a phoebe and a ruby-throated hummingbird come to mind) get absolutely soaked to the skin, which renders them unable to fly. The hummingbird engaged in bathing behavior as the rain came down, and kept bathing and bathing until he was saturated. Not good. Big duh. (He didn't make the same mistake again; he migrated and came back the next spring). Not sure how to teach a baby bird to come in out of the rain...I think they have to learn by experience.
For whatever reason, Garrett sits for hours with rain beating down on his gorgeous plumage, staring morosely into his roost hole.
It drives me nuts. I keep putting food out for him as it gets soaked (Zick Dough doesn't do well in rain, and he won't use the plexi dome feeder that the rest of the birds use).
So everyone's getting soaked. Mrs. Bluebird is damp, her hair in a wet streak.
Another nasty rainy day comes, pouring and in the 40's, on the 26th of January. Garrett sits out all morning and then at about 11 AM-- glory be!! he pops into his cavity and passes the worst of the rain in comfort.
Whew. He's got sense enough to come in out of the rain.