Which genre of animal or nature documentaries fascinate you the most? Why?

I find insect and plant documentaries the most interesting to me. Funny thing is, I don't even have that big of affection for either of them. I much prefer animals but insect and plant documentaries spotlight how interesting and strange they are.

Ocean documentaries are very unique because they expose us to the beauty that we can't see with our naked eyes. I couldn't believe how colorful and alive it is deep into the ocean. It almost looks like a painting. It's also a good life lesson of what lies beneath the surface of what we see. Therefore, they are my favourite animal documentaries, though anything with narration of David Attenborough is worth watching.