Low Light .... Ants

I got here at the hotel in Costa Rica at 4:30PM and the sky was overcast and the sun was low in the sky.....a sunset appears but there were too many building in the way to get a good shot. So it is the marching ants that I saw on the sidewalk around the corner from the hotel entrance. They were really moving quickly; most were carry the red seeds from....oh dear.. what is that tree called with the spiky red flowers that the humming birds like? 

Anyway....I have to go I am meeting the girls for dinner very soon.