I got Hypoponera opacior today, it'll be my first actual attempt at keeping them. Dunno if I got fertile queens though, but I got a few alates+alate brood. Maybe I got ergatoid queens, but they look too similar to workers for my eyes to tell the difference. But if not, hopefully they'll mate with each other.
The ones here actively forage on the surface once the colony gets to a decent size. The colony I got numbered 50+ workers inside the colony not including foragers. So quite a large colony. They were eating a large dragonfly leg, which is how I knew they were there.
I have never seen them scavenge something that big. So that might explain why nobody's had much success, no large sources of protein.