Thanks for your nice paper. I wonder why you didn't cite the 2005 paper by Scott and Aquino, "It's a frog-eat-frog world...."? Inclusion of that paper and mention of their findings would have put this work in a broader context. Scott, N.J., Jr., and Aquino, A.L. 2005. It’s a frog-eat-frog world in the Paraguayan Chaco: food habits, anatomy, and behavior of the frog-eating anurans. In Ecology and evolution in the tropics: a herpetological perspective. Edited by M.A. Donnelly, B.I. Crother, C. Guyer, M.H. Wake, and M.E. White. University of Chicago Press, Chicago, Ill. pp. 243–259.