Six hundred forty-seven Citizen Scientists joined the Synchronized Bio-monitoring and Hornbill Count from March 2017 to December 2019 in four Protected Areas: Mt. Banahaw - San Cristobal Protected Landscape (Tayabas City), Balinsasayao Twin Lakes Natural Park, Mt. Kanlaon Natural Park and Northern Negros Natural Park in Negros Island, Philippines. This has resulted to 34 observations of endangered Visayan tarictic hornbills and 69 detections of Luzon tarictic hornbills. The Critically endangered Rufous-headed hornbill Rhabdotorrhinus waldeni was only recorded in Northern Negros Natural Park.
Other threatened endemic species recorded In Negros include the Endangered Yellow-faced flameback (Chrysocolaptes xanthocephalus), Southern Philippine hawk eagle (Nisautus pinskeri), Flame-templed babbler (Daycrotapha speciosa), White-throated Jungle flycatcher (Rhynomias albigularis), Vulnerable Visayan flowerpecker (Dicaeum haematostictum) and the White-winged Cuckooshrike (Coracina ostenta).