Nils no Fushigi na Tabi (Movie)

These extremely tiny people - sometimes referred to as lilliputians - often face a number of challenges living in a normal human-sized world. They might live alongside humans openly or in secret, or live deep in the forest or other rural places humans are less likely to dwell. Getting eaten or stepped on by bigger creatures is a real concern, though tiny people are often portrayed as a friend to animals who are able to communicate with them and ride them for transportation. In some cases, ordinary people become tiny people due to a magic spell or transformation item.

Collection of historical semi-realistic or realistic works that detail the historical events of Europe or daily life of people in European historical context.

Every cinema or direct to video anime film that came out in 1985.

1984: https://myanimelist.net/stacks/34018
1986: https://myanimelist.net/stacks/34034
https://myanimelist.net/stacks/34035

Miniature worlds that are explored through the eyes of insects, mice, small animals, lilliputians (little people), fairies, etc. I'll make note of the ones that are a bit more interesting or polished for an adult audience, as opposed to dated children's series, which, unfortunately most of the titles on the list fall under.

All OVAs from 1983-1985 that I've found so far. This is the majority of them, but I'm probably still missing a few obscure ones, recaps, or miscellaneous releases. One notable OVA excluded from this period is Cream Lemon, on account of it being a hentai series.

Note: I've seen varying dates for Midori no Neko, which is sometimes listed as 1983. I'll leave it here for now.

Have you been told about the birds and the bees? Here's anime about them. Except penguins, who formed their own stack in the Antarctica:

https://myanimelist.net/stacks/11062

And Pekkle the duck is tap dancing here:
https://myanimelist.net/stacks/35358

All OVAS,ONA,Special, TV Special with Opening for AMQ, Famous or not!

(Openings being single, not part from TV series)

Part 1-10
https://myanimelist.net/stacks/54788
https://myanimelist.net/stacks/54790
https://myanimelist.net/stacks/54791
https://myanimelist.net/stacks/54792
https://myanimelist.net/stacks/54795
https://myanimelist.net/stacks/54797
https://myanimelist.net/stacks/54798
https://myanimelist.net/stacks/54800
https://myanimelist.net/stacks/61415

Collection of anime about forest, and animals/people living in the forest