Haven’t found the original source for the image, but now I’ve discovered the Trapped In Amber subreddit!
A few other good ones from the subreddit:
100 million years old spider-like creature found trapped in amber (x-post from r/WTF) from trappedinamber
Researchers found a 98-million-year-old Horned Vampire Ant encased in amber. It had a horn reinforced with metal and jaws that appeared to be designed to draw blood. from trappedinamber