Draco mindanensis of this species' patagium, or the extensible fold of skin used in flight, is red in males and dusky in females. Also, "D. mindanensis" can be distinguished from other species of "Draco" in the Philippines by its larger size (maximum length has been recorded at 105 mm), mode of five ribs supporting its patagium, upward directed nostril, lack of Y-shaped series of scales on forehead, presence of lacrimal bone and dorsal body coloration of pale brown with a slight greenish case in males. In males of this species, the dewlap, or the inflatable loose skin under the throat, is large,
White-necked heron their young. Population explosions have been known when the environmental conditions are right for this species in places where they have been rare or unknown. Large water dwelling bird, diurnal animal. Slate-grey to black with distinctive black spots in the centre of the lower fore-neck and throat. During breeding season plum coloured nuptial plumes are present on the back and breast. Flight: stately, slow steady wing beats. Body size/length 76–106 cm, Wingspan 147–160 cm, Weight 860g.I have studied the bird, with many photos, estimate wingspan near 2m The bill is black and the facial skin is commonly blue or yellow.