The ant pictured below is a member of the genus Rhytidoponera. The curious thing about it is that the creature is labouring to carry a shoot of moss [Pseudocrossidium crinitum].
As far as we know, ants feed on other invertebrates and forage for such matter as honey. Moss somehow doesn’t fit the bill. The specimen above lugged its burden over difficult terrain for about a metre, then abandoned it. Any clues about this behaviour are welcome.