Posted: 21/10/2016 at 17:52
Thanks Pete for that link - interesting.
There doesn't seem to be a hard and fast rule about which species we can truly term native or non native.
You're right Verdun - I don't suppose it really matters - it was simply wondering how long something is here before you pronounce it native as such. What set me thinking about it was the number of times posters on the forum and elsewhere have mentioned about getting rid of various things as they are non native.
Going off Redwings interpretation, it could be said we don't have many truly native species.
Beautiful fossil Pansyface
Thanks all - food for thought.