| Citation |
IUCN SSC Amphibian Specialist Group 2018. Rhacophorus angulirostris. The IUCN Red List of Threatened Species 2018: e.T79129515A79129413. http://dx.doi.org/10.2305/IUCN.UK.2018-2.RLTS.T79129515A79129413.en. Downloaded on 08 May 2019. |
Description |
Geographic Range
NATIVE
Extant (resident)
Indonesia (Kalimantan); Malaysia (Sabah)
NUMBER OF LOCATIONS
3
UPPER ELEVATION LIMIT
1,800 metres
LOWER ELEVATION LIMIT
700 metres
UPPER DEPTH LIMIT
LOWER DEPTH LIMIT
Geographic Range in detail
ESTIMATED AREA OF OCCUPANCY (AOO) (KM²)
CONTINUING DECLINE IN AREA OF OCCUPANCY (AOO)
EXTREME FLUCTUATIONS IN AREA OF OCCUPANCY (AOO)
ESTIMATED EXTENT OF OCCURRENCE (EOO) (KM²)
20397
CONTINUING DECLINE IN EXTENT OF OCCURRENCE (EOO)
EXTREME FLUCTUATIONS IN EXTENT OF OCCURRENCE (EOO)
CONTINUING DECLINE IN NUMBER OF LOCATIONS
EXTREME FLUCTUATIONS IN THE NUMBER OF LOCATIONS
RANGE DESCRIPTION
This Bornean species is known from Kinabalu National Park and Mt. Trus Madi in northern Sabah, Malaysia, and Babao River, in Kalimantan, Indonesia (M. Kamsi pers. comm. May 2017). The record from Sumatra, Indonesia has been assigned to Rhacophorus pseudacutirostris (Dehling 2011). It has an elevational range of 700–1,800 m asl, its estimated extent of occurrence (EOO) is 20,397 km2, and all individuals are considered to occur in three threat-defined locations.
Population
CURRENT POPULATION TREND
Decreasing
NUMBER OF MATURE INDIVIDUALS
POPULATION SEVERELY FRAGMENTED
Unknown
CONTINUING DECLINE OF MATURE INDIVIDUALS
Population in detail
EXTREME FLUCTUATIONS
NO. OF SUBPOPULATIONS
CONTINUING DECLINE IN SUBPOPULATIONS
EXTREME FLUCTUATIONS IN SUBPOPULATIONS
ALL INDIVIDUALS IN ONE SUBPOPULATION
NO. OF INDIVIDUALS IN LARGEST SUBPOPULATION
DESCRIPTION
It appears to be very common in Kinabalu National Park in Sabah, where the population is considered to be stable (P. Yambun pers. comm. Jan 2018). However, due to ongoing decline in the extent and quality of its habitat in Kalimantan, the population is suspected to be decreasing.
Habitat and Ecology
SYSTEM
Terrestrial, Freshwater (=Inland waters)
HABITAT TYPE
Forest, Wetlands (inland)
GENERATION LENGTH (YEARS)
CONGREGATORY
MOVEMENT PATTERNS
Not a Migrant
CONTINUING DECLINE IN AREA, EXTENT AND/OR QUALITY OF HABITAT
Habitat and Ecology in detail
HABITAT AND ECOLOGY
This species has been recorded only in primary submontane and montane forests. Males call from trees overhanging small, clear, rocky streams where the larvae develop.
CLASSIFICATION SCHEME
Habitats Suitability Major importance
1. Forest 1.6. Forest - Subtropical/Tropical Moist Lowland Suitable Yes
1.9. Forest - Subtropical/Tropical Moist Montane Suitable Yes
5. Wetlands (inland) 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls) Suitable Yes
Threats
Agriculture & aquaculture
Annual & perennial non-timber crops
Biological resource use
Logging & wood harvesting
Threats in detail
THREATS
Deforestation is the main threat to this species from logging, agricultural expansion, and oil palm plantations (Indonesia Red List Assessment Workshop May 2018). There are no threats to this species in Sabah, as it occurs in a well-protected and well-managed national park, as well as the peak of Trus Madi, where no logging is occurring (P. Yambun pers. comm. January 2018).
CLASSIFICATION SCHEME
Threats Timing Stresses Scope Severity Impact score Invasive species Virus
2. Agriculture & aquaculture 2.1. Annual & perennial non-timber crops 2.1.2. Small-holder farming Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
Low Impact: 3
2.1.3. Agro-industry farming Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
Low Impact: 3
5. Biological resource use 5.3. Logging & wood harvesting 5.3.3. Unintentional effects: (subsistence/small scale) [harvest] Ongoing
1. Ecosystem stresses 1.2. Ecosystem degradation
Low Impact: 3
5.3.4. Unintentional effects: (large scale) [harvest] Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation |
