[–] hmimperialtortie Cats. Just cats. 13 points

Oh ffs, cats have been in Europe for millennia. How about listing men as an alien invasive species and getting rid of them.

Humans outside Africa.

When does a species go from introduced to native? For plants and insects my guess is it would take a long time for ecosystems to adapt to a lot of introduced species, but for animals higher up the food chain it might not matter as much so long as it isn't adding a new niche.

The researcher just wants people to keep their cats inside more during nesting season. Saying cats are alien and invasive is like saying dandelions (or honey bees for that matter) are alien and invasive to North America. It's just a fact. It's not like "alien" = high-tech warfare and lots of explosions like in Hollywood disaster films.

[–] hmimperialtortie Cats. Just cats. 0 points

Yes, I’m all for keeping cats inside - mine have been indoor only for many years, as much for their safety as for the birds’ - but this “alien and invasive” terminology comes across like some “kill all the cats” psychopath. Hello, all domesticated animals can fit that description, and yes, all humans outside Africa.

I don't think most domesticated animals would be considered invasive, just introduced (which I gather is another term for "alien"). Do they blend in or disrupt local ecosystems if they go feral? We're invasive, but I doubt cattle or sheep would be considered anything more than introduced in most places. I'm sure they're on that list somewhere. Biologists catalogue everything.

This reminds me a bit of when I kept referring to "Mytilis edulis, the edible blue mussel", when presenting my honours thesis in geology, and someone thought I was making a joke. Why no, malacologists gather from around the world to decide on official common names.