IUCN threat status:

Least Concern (LC)

Distribution

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Range Description

The species is known from relatively few records, but has a wide range across southeastern Asia, however it appears to be very local in occurrence, with scattered populations across its range. There are records from Borneo (south, east and northwest Kalimantan, central Sarawak, Brunei), Belitung, Singapore, Peninsular Malaysia (Pahang and Selangor), south Thailand (Narathiwat) (see Dow et al. 2007).

The upper limit of altitude for C. fluviatilis is unknown, but existing records are from lowland habitats. Twenty locations have been recorded for this species (Dow et al. 2007, Dow unpublished 2010): two in northwest Kalimantan, one in central Kalimantan, one in south Kalimantan (Lieftinck 1953: the information is vague, possibly this refers to up to three separate locations, but it is treated as one location here), one in east Kalimantan, six locations in Peninsular Malaysia (Tasik Chini, (C.-Y. Choong, pers. comm. 2011), the Paya Indah Wetlands, Tasek Bera and Sungai Bebar in Pahang, Ampang and Sungai Ayer Hitam in Selangor), two locations from Brunei (one of them is now degraded), one location from Thailand, one from Sarawak, four from Belitung, three from Singapore (Tang et al. 2010, R.W.J. Ngiam pers. comm. 2010), but from one of these only a single individual has been recorded. For eight locations the only records are fifty years or more old, and we have no information on the current status of the habitats, however there has been widespread degradation of lowland habitats in Indonesia. Of the recent locations one has already been degraded (Orr 2001), no recent check of this location has been made. On this basis, only nine locations can be considered to be currently known. Of the currently known locations, one (Binyo Penyilam in Sarawak) is a Conservation Area within acacia plantations, but enforcement of its protected status is problematic, however it is a proposed National Park. The remaining location in Brunei is protected. The sites in Singapore are either in the National Parks system, or in an army training area, and not currently threatened.

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Source: IUCN

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