Attributes / relations provided by
♦ 1Goodman, SM and PC Gonzales. 1990. The birds of Mount Isarog National Park, southern Luzon, Philippines, with particular reference to altitudinal distribution. Fieldiana: Zoology (NS) 60:1–39
♦ 2Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014.
EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
♦ 3Jetz W, Sekercioglu CH, Böhning-Gaese K (2008)
The Worldwide Variation in Avian Clutch Size across Species and Space PLoS Biol 6(12): e303. doi:10.1371/journal.pbio.0060303