The herpetological knowledge of southern Mindanao is one of the largest gaps in Philippine herpetology. To augment this, we generated a comprehensive list of amphibians and reptiles found along the southern slope of Mount Busa in Sarangani Province, Philippines between June 2018 and August 2020 using opportunistic sampling in various microhabitats across different forest types. We recorded at least 68 species of herpetofauna, of which 28 species were amphibians and 40 species were reptiles. Around 65% of the species recorded are endemic to the Philippines. Mount Busa appears to harbor a relatively rich herpetological diversity that is needing conservation and scientific attention. Our study provides a glimpse of the herpetological diversity of southern Mindanao, but we emphasized that more field-based research is needed in nearby areas to improve our understanding of the herpetological community in the region, thereby overcoming Linnean and Wallacean shortfalls in our knowledge of Philippine amphibians and reptiles.

The Busa Mountain Range hosts one of the last remaining forests in southern Mindanao, Philippines. Previous bird surveys were confined only to the northern slope, leaving the southern slope in Sarangani Province a relatively understudied area in terms of avian fauna. To augment this gap, we did a rapid inventory survey of bird presence in the Busa Mountain Range employing a combination of line transects, point counts, opportunistic listing, and observation from vantage points, which were supplemented by secondary data from a previous avifaunal assessment. We recorded a total of 116 bird species from 45 families and 88 genera. Despite the significant number in species tally, our survey of birds in the Busa Mountain Range is still inadequate because of the few field sites visited (10 localities) and limited survey time for each locality (82.85 person-hr on average). The presence of several threatened species (DAO 2019- 09: 16.37%, n= 19; IUCN V3.1: 13.79%, n= 16), endemic species (53.44%), and anthropogenic disturbance indicate the strong need for protection of the bird fauna and their habitats in the Busa Mountain Range.

Orchids are one of the most diverse yet threatened plant families in the world and the Philippines. Despite the new species discoveries of orchids in the country in recent years, diversity and distribution studies are still severely lacking. Here, we provide a list of orchid species found among different forest types in Mount Busa and provide information on the species’ altitudinal and vertical distributions and ornamental use. We recorded 108 species of orchids from 51 genera, of which 53 species are endemic to the Philippines and 15 species are known only to occur on Mindanao island. Species composition differed among forest types, with the MASLEF (mixed advanced secondary lowland evergreen forest) hosting the highest number of orchid species recorded, followed by the UMF (upper montane forest), LMF (lower montane forest), and MESLEF (mixed early secondary lowland evergreen forest). Our results suggest a relatively rich and distinct orchid diversity among different forest types in Mount Busa that reinforces the high conservation value of the mountain range.

No abstract

No abstract