GOLONDRINA ALAS ASERRADAS, Stelgidopteryx serripennis, Northern Rough-winged Swallow https://t.co/VmeGXG1Yqw #AvesGuate https://t.co/f9cRq5mGmM

GOLONDRINA ALAS ASERRADAS, Stelgidopteryx serripennis, Northern Rough-winged Swallow https://t.co/VmeGXG1Yqw #AvesGuate pic.twitter.com/f9cRq5mGmM

— Aves de Guatemala 🔴 (@AvesGuate) October 31, 2018