Teaching Advanced Tropical Field Ornithology to a group of talented and committed Cornell undergrads was one of the highlights of my 2015. It was fantastic to guide students through the process of generating scientific hypotheses and testing them in the field, and I am very pleased that the first project from this course was recently published in PLoS ONE. Thanks to all the hard work by our awesome class, and especially to Teresa and Reid who took the lead on analysis and writing the manuscript. Great job everyone! We hope our project inspires others to conduct more field playback trials, as we argue they provide often critical information needed to assess the taxonomy of allopatric populations.