Looking Like Cotton Balls

Bushtits fly around in a flock of a dozen or so in winter.  They stop over to eat the suet in my backyard.

After that, they will inspect the leaves nearby for a bug.

"I may still find a bug or so before
freezing.  An important protein source."

Then all of them jump into the cold bird bath to clean off the dust and dirt.

"The frequent cleaning is necessary to fly fast and light."