My in-laws own a sign company in Spokane, WA called National Barricade and Sign. While we were visiting them last week, my father-in-law was telling us about a robin who was trying to build a nest in their shop on top of the garage door opener. Every time they would remove the robin’s attempt to build the nest, the robin would persist and keep at it.
Not to be out-done by a robin, they setup a fan atop a ladder that blew continuously. Every time the robin would lay a twig it would blow away.
He said it was fun to watch the robin try to figure out why the twigs weren’t staying!