light brown head and thorax and black abdomen
Light drizzle brought them up
huge swarm
very fast runners

I highly doubt that is 2mm in length. Did you use a ruler, or did you estimate it? It looks like Nylanderia.
I estimated because I do not have mm they were almost half a cm. Are those Poly?
I estimated because I do not have mm they were almost half a cm. Are those Poly?
That would be the right size for Nylanderia.
I estimated because I do not have mm they were almost half a cm. Are those Poly?
Half of a centimeter is 5 millimeters. There are 10 millimeters in a centimeter. Are you asking wether or not they are polygynous?
Ants often meet to swarm on special places like hills or other exposed things. Thst does not mean, that they are polygynous. Only when more than one fertile queen is IN THE NEST, than the colony ist polygynous.
But FYI there are several forms of polygyny.
Franz
if you find any mistakes, it's my autocorrection. it doesn't speak english.
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