The ants sometimes feed each other with a nutritious liquid. It is called trophallaxis. In the picture you can see an ant that has just been given another ant a "meal" with the liquid.
The fact that this is a way of life for an ant makes Trophallaxis Drop by ~MissFlykt all the more extraordinary in capture. It is fantastic that we get to see so much of the ants in detail, the execution good in the subtle aspects that allow the ants to stand out more overall. (
Suggested by DragonflyAndromeda and Featured by
This is extraordinary! It's cool to see something like this so large. The eye just can't discern so many rich details of something so small. So to see it in an amazing capture like this is quite awesome.