Spilornis pallidus = Spilornis cheela pallidus, Crested Serpent Eagle ssp. from the lowlands of northern Borneo
Date 1874
Source Catalogue of the birds in the British Museum. Volume 1
Author John Gerrard Keulemans (1842–1912)   
Source: https://commons.wikimedia.org/wiki/File:SpilornisPallidusKeulemans.jpg

The crested serpent eagle (Spilornis cheela) is a medium-sized bird of prey that is found in forested habitats across tropical Asia. Within its widespread range across the Indian Subcontinent, Southeast Asia and East Asia, there are considerable variations and some authorities prefer to treat several of its subspecies as completely separate species.