Well no, the first observation was in 1943 https://academic.oup.com/jmammal/article-abstract/24/2/231/9...
Which is noted in the paper (2 points) https://news.ycombinator.com/item?id=42449402
Which is noted in the paper (2 points) https://news.ycombinator.com/item?id=42449402
As do Abert's squirrels in Colorado.
Free protein!
( Seen by myself several times. )