Microbes
The vast majority of life on planet earth are microbes. I admit that being a microbiologist that I'm biased in this, but it is absurd to put out two series about species on Earth and not cover bacteria and archaea at all. Even human beings are more bacteria than they are human. There is plenty of amazing videos out there of microbe behavior, or more could be filmed, Focusing solely on the eukaryotic domain of life as if that is all there is on the planet, or the most important of them occurs too often and is wrong on both accounts.
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