Ants again

From my vantage point at the pool ladder, watched red ants climbing and descending the bare slim trunk of a tropical plant - perfectly placed to the left side so their bodies were in relief against a green background. Glad they're there and not on our porch with the blacks - as the blacks don't bite and the reds do. As with all the ants I know, they stop briefly to greet each other in passing. What perfect social beings they are.