So these guys are a common occurrence on the hummingbird feeder, and they are well known for this behavior. I believe they are called Acorn Woodpeckers.
When I moved here earlier this year, it was absolutely hilarious to see this behavior. Previously, I've never seen anything but hummingbirds use their namesake feeders.
Edit: I updated the picture with a better resolution version! Original posted image is here:
That's really interesting! It does make perfect sense. It's extremely common on my patio to see these guys doing this. In fact, I just got some high resolution images a few minutes ago to add to this post.
This one below is particularly funny, as a feisty hummingbird wanted a turn and they were eying each other.