Feral means non-native/introduced/exotic. At least, it does in Australia and in this group.
New rules - no copy and paste bombs, especially in the middle of active discussions. Instead, post a link with a short summary or a few interesting paragraphs. Do not copy and paste someone else's words as a substitute for responding personally. Do not spam the group by copying the same thing into multiple threads.
Many hosts expect active participation from group members and desire constant activity on their groups. I don't. Many people I invite to my groups express concern that they don't have the time to devote to more groups. My groups are their for the benefit of members and I am happy for them to get something from the group in their own time and return nothing, even if they ask lots of questions. In many of my groups I would rather have a small amount of information that is of timeless value rather than a constant stream of chatter (though I don't mind if you just want to chat). I welcome debates as they help to ensure that the information provided is sound. I often rewrite my posts after lengthy debates as I find that I can express my views much more clearly and concisely and back them up more rigourously.
But don't be afraid to contribute if you have something!