The wipeouts of large animals around the planet by humans, including by Native Americans, are beautiful examples, and for a truly grand display, the wipeouts of Australian plants and animals, with the introduction of species from England, that the British couldn't live without. Need I even mention passenger pigeons and the dodo, or the birds used for women's hats in Grand Paris? The rats in Hawaii?
It is often and typically the little characters that matter most. As the counselor for my Wildlife Merit Badge inscribed on my brain, over half a century ago, "Even that little fly that's bothering you has a purpose here on earth."
Or consider the microscopic plankton that are 40% gone since 1950, thanks to us, even it is they who provide 40% of the oxygen we breathe.
Anyone who thinks about it and has been paying two bits of attention over the years has noticed the diminishing of insects around their environment. This video looks to me like a small yet literal sampling of the crumbling foundation beneath us.