Oh I got it from here but I tracked it down with a Google search.
I can’t say if this is the original source but maybe. https://www.theguardian.com/environment/2018/may/21/human-race-just-001-of-all-life-but-has-destroyed-over-80-of-wild-mammals-study
Biomass VS population makes some sense though. Having a million ants would be sure, lots, but having a million elephants would be WTF wholy shit!
The big problem is that they know. They know they are making the violence, and unfairly complaining about it. Pointing it out changes nothing for them.
They know and they say it anyways and don’t care if they are wrong because it works. It is unfortunately working.