Nuthatches are perennially peripatetic; they are forever nimbly scrambling around tree trunks in search of food. Like creepers, chickadees and bushtits, they are industrious and seemingly indefatigable. I have never seen one at rest, just doing nothing. Even hummingbirds, certainly the most energetic of birds, take breaks and nap in the sun.
Nuthatches have the ability to scale trees upside down, as shown above, and sideways. Needless to say, it was a workout to follow their movements with my camera.