Male Red-winged Blackbird being a little strident
The Hole Story: Nest Webs
https://www.allaboutbirds.org/news/hole-story-how-woodpeckers-make-homes-forest/
Woodpecker nest holes are valuable pieces of real estate that may be used by hundreds of other species over many years. Researchers are using the concept of "nest webs" to understand how this valuable resource passes from one owner to the next.
Really interesting article Richard. We always have northern flickers in our yard but never knew they served such a vital function. It seems unfair that these helpful chaps are so easily evicted from their own holes!
Great article on the woodpeckers, I agree. We’re crawling with flickers around here.