Eastern Screech Owl is getting a soapy bath to remove oil from its feathers. The oil was used to remove a sticky substance that the owl got into.

i would guess it just couldn’t remove the substance by itself.

you could also require alt-text for every post (or at least for new accounts) because it would increase the effort to post. but that could probably discourage some users from posting and is kinda hard to check automatically.

• A limit of two posts per person per day.

This should probably be linked to the account age and combined with a time limit between posts of 30 minutes or an hour, as the bots I have seen usually post in quick succession.