Guille Iván Spajic tells us that "this tiger-heron has a characin, most certainly Oligosarcus oligolepis because the tail fin is very forked. But there are many species of characins, so we'd better leave it as Oligosarcus sp."
Parents leave it on his own in the nest
Only one out of two remains alive
Only one out of two remains alive
Only one out of two remains alive