[beeknuckle]

While visiting Sweden this summer I saw all these little contraptions wandering around people's yards. I got really excited when I learned that they're essentially "lawn roombas": https://www.digitaltrends.com/home/robot-lawnmowers-are-maki...

They were everywhere.

[eitland]

One disadvantage: they wound and kill hedgehogs.

The hedgehog will curl up and (at least some of) the machines will drive into it.