These are two Macu men as they checked me out. The Macu's are a small tribe of Indians located deep in the Colombian Amazon region.
We called the tall one "Skinny" although the Macu's are not skinny but well built and muscular. On one occasion before I got there, Skinny, for no apparent reason, inserted a dart tipped with curare into his blow gun and shot pilot Paul Dye in the back. The dart penetrated his back and numbed him up for a time but didn't kill him.
I remember well Skinny and I spending a sweltering afternoon together sitting near a jungle stream, while the others were fishing downstream ... each one of us in his own world. These Macu's are really primitive. They can change their attitude and expression on a dime and for no apparent reason.