Yes. Hummingbirds sleep on their favorite perching spots.
They especially like to use thick trees or bushes, such as a fur tree, because these will provide protection from the elements while the hummingbird sleeps.
Sometimes when sleeping perched on a branch, the hummingbird will loosen it’s grip slightly, which causes it to turn upside down on the branch. These upside down birds are sometimes mistaken for dead birds because of their upside down position.
When found in this state they may not even respond to your touch. They should just be left alone until they return to their normal state on their own, usually when the sun comes up and warms their bodies.
It may take as much as an hour for the hummingbirds to fully recover from this hibernation like state called torpor.
Hummingbirds are small, colorful birds with iridescent feathers. Their name comes from the fact that they flap their wings so fast (about 80 times per second) that they make a humming noise.
Here are 10 things you can do to attract hummingbirds shared by Birdwatchersdigest.com.