2-3mm,in soil room they build(1cm)
are they rock ants?
This looks like a Temnothorax species to me. Some species are also called Acorn Ants because of their nesting habits.
My Temnothorax cf. nylanderi colony for comparison:
https://www.youtube.com/watch?v=BX3DLAaCpwc
https://picasaweb.google.com/117715245024546712055/FormicariumTemnothoraxCfNylanderi?noredirect=1
This looks like a Temnothorax species to me. Some species are also called Acorn Ants because of their nesting habits.
My Temnothorax cf. nylanderi colony for comparison:
https://www.youtube.com/watch?v=BX3DLAaCpwc
https://picasaweb.google.com/117715245024546712055/FormicariumTemnothoraxCfNylanderi?noredirect=1
thank you,i thought they are the same species :D