Portals, continued

Here's another image of the tachi cauaçu tree (Tripolaris sp.), host of these tachi ants seen in the image. I take it that this piece of natural art is one of the former portals for the ants, which make their home inside the hollow part of tree. I also speculate that the original entranceway for the ants was sealed off by the tree in some chemical reaction to the coming and going of the guests. Strictly speculation on my part.