I have a small colony of common garden ants (I'm assuming Lasius Niger) and find them fascinating. I'm looking to make a new formicarium and have access to two species that have caught my fancy, the green-head ant (Rhytidoponera Metallica) and the meat ant (Iridomyrmex purpureus). My question is do any of you keep or are familiar with these species and if so if you have any opinion on which to keep? My main interest being ease of care and which is more rewarding to keep (be it because of quirks, activity etc.) Any information would be much appreciated.