Rucervus schomburgki 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Cetartiodactyla Cervidae

Scientific Name: Rucervus schomburgki
Species Authority: (Blyth, 1863)
Common Name(s):
English Schomburgk's Deer
Cervus schomburgki Blyth, 1863
Taxonomic Notes: Giles (1937) stressed the close taxonomic relationship of this deer with R. duvaucelii, within which it was placed by Haltenorth (1963: 58), Groves (1982; tentatively) and Corbet and Hill (1992). It was considered a full species by Pocock (1943), who even assigned it to its own monotypic genus Thaocervus, and by Lekagul and McNeely (1977), Groves and Grubb (1987) and Pitra et al. (2004). Most sources during 1945 to 2015 placed the species in the genus Cervus.

Assessment Information [top]

Red List Category & Criteria: Extinct ver 3.1
Year Published: 2015
Date Assessed: 2014-11-19
Assessor(s): Duckworth, J.W., Robichaud, W. & Timmins, R.
Reviewer(s): Brook, S.M. & González, S.
The wild Thai population of Schomburgk’s Deer died out around 1932, with the last captive individual being killed in 1938. None of the indications that the species inhabited other countries can be shown to have any compelling basis and some are clearly in error. Thus the species is considered a single-country endemic, to Thailand, where it is certainly Extinct.
Previously published Red List assessments:
2015 Extinct (EX)
2008 Extinct (EX)
1996 Extinct (EX)
1994 Extinct (Ex)

Geographic Range [top]

Range Description: Rucervus schomburgki was endemic to Thailand and is thought to have become extinct when the last captive individual was killed in 1938; the last known wild animals were killed in 1932 near Sai Yoke and Kwae Yai, although this date was not universally accepted at the time (Harper 1945, Lekagul and McNeely 1988). The recent range in Thailand seems to have lain within 13°30′–18°N, 98°30′–102°E, comprising the central plain of Thailand (Giles 1937, Harper 1945, G.J. Galbreath in litt. 2008). Attempts to circumscribe the range have, however, been bedevilled by a surprisingly large number of statements of occurrence elsewhere.

Statements of occurrence in the Sanda Valley, Yunnan, China by Sclater (1891: 180) and Bentham (1908) led to this locality being included without any caveat by Grubb (2005), and relate to both a frontlet and a skin. However, Sclater (1891) listed the set of antlers as of unknown locality, and the skin has a "?" mark that makes its Sanda Valley locality no more than tentative (G.J. Galbreath in litt. 2008). Then, Bentham (1908) indicated that the antlers had been collected in the Sanda Valley by John Anderson in 1878, without giving explicit source for this statement. In fact, Anderson was in the Sanda Valley in 1868, not 1878, and moreover recorded no such antlers in his thorough write-up of zoological results of his Yunnan expeditions. This locality assignment for the antlers should be seen as an error of Bentham's, presumably stemming from the earlier, tentative, assignment of Sanda Valley to the deer skin Sclater also reported (G.J. Galbreath in litt. 2008). Pocock (1943) included under distribution of the species “N. Siam [Thailand] and, it has been alleged, Yunnan and Lao PDR”, indicating his own concern with the Sanda valley ‘evidence’. The Shan states (Myanmar) have also figured as part of the species’s range, e.g. by Blanford (1891: 540). Reference to historical occurrence in these areas seems to stem from Brooke (1876), who wrote, based on written communication from a Dr Campbell of the Bangkok British Consulate) in reference to new specimens sent to him that ". . . all specimens were procured in northern Siam, probably even in the tributary states named Laos and Shan". Campbell seems to have based his opinion at least partly on what professional indigenous hunters told him or others. Brooke gave no definition of "northern Siam" (conceivably it simply meant some way north of Bangkok), and Lao PDR in this context could well have included part or all of the Korat Plateau and other areas in present-day Thailand which are ethnically Lao and were often referred to in the past by terms such as ‘Siamese Laos’. It is not even clear that Lao PDR and Shan were not just speculation on the part of Campbell and/or Brooke (G.J. Galbreath in litt. 2008).

Not surprisingly, Harper (1945) considered the Shan states report to be “highly indefinite” and occurrence in “Indo-China” [presumably = Lao PDR, Cambodia and Viet Nam] to be “in error”, although he took the ‘Sanda valley’ frontlet as “apparently authentic”, perhaps being focussed on the identity (which is not in doubt) rather than the provenance (presumably assuming that the association with the highly-respected Anderson’s name was enough). A more modern reanalysis concluded that "the northern Thailand, Myanmar, Yunnan, and Lao PDR range extensions suggested in the literature are based on erroneous or quite inconclusive items of evidence", sometimes perhaps influenced by a switch of Thai names between Eld’s and Schomburgk’s Deer by Flower (1900) (G.J. Galbreath in litt. 2008).

Two loose antlers, presumed to be a pair, of Schomburgk’s Deer photographed in Phongsali province, far northern Lao PDR, in 1991 were a most surprising find. This has been taken to suggest the species might survive, at least into the 1980s, and that it did indeed occur in Lao PDR (Schroering 1995) and it was even taken as sufficient evidence that the species was not extinct by MacPhee and Flemming (1999). However, while these are indeed Schomburgk’s Deer antlers, it has proven impossible to recover a consistent story from their owner of the antlers’ origin (e.g. Duckworth et al. 1999) and there is no compelling evidence that they had come from a recently killed animal, rather than being decades-old stock still in trade; Williams (1941) noted that even then that Schomburgk’s Deer antlers "keep coming down to Bangkok from Paknampo and Korat by railway amongst collections of ordinary deer-horns consigned to Bangkok Chinamen . . . the horns are probably quite old . . ." and Schomburgk’s Deer antlers are still in trade in Thailand (Srikosamatara et al. 1992). The owner of the antlers was, according to his daughter, a middleman trader in wildlife parts sourced from all over Indochina (W.G. Robichaud pers. comm. 2008, based on visit in 1996). Consequently, while remains of the species have been seen in Lao PDR in recent times, they cannot be taken as evidence that the species survives today, or ever occurred in Lao PDR.
Countries occurrence:
Regionally extinct:
Estimated area of occupancy (AOO) - km2: 0
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Schomburgk’s Deer was apparently “not uncommon” in the late 19th century and herds still occurred around 1900–1910 (Harper 1945), but the species underwent a very rapid decline: Harper (1945) stated that it was never seen in the wild state by a European (although this may be better taken as a lack of such reports, because Europeans working, for example, on the Paknampo railway in the early days would almost surely have seen and hunted these deer; G.J. Galbreath in litt. 2008). The usually successful hunter Arthur S. Vernay made three trips to Thailand specifically for the species, the first in 1920, but failed to see the species. There are some hundreds of skulls, frontlet and antlers in collections (Harper 1945), but the species is now extinct.
Additional data:
Number of mature individuals: 0-0
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: The species inhabited seasonally inundated swampy plains with long grass, cane, and shrubs; it apparently avoided forest (Giles 1937), although there seems to be no information on where animals went at the height of the wet season, when much of the dry-season range was under water.
Systems: Terrestrial; Freshwater

Use and Trade [top]

Use and Trade: Relics of this extinct species (usually antlers) are still traded to a limited extent. During its last few decades of existence Schomburgk's Deer was hunted heavily, presumably for meat, and certainly for antlers which went into the Chinese medicine trade (e.g. Williams 1941, Harper 1945).

Threats [top]

Major Threat(s): Commercial production of rice for export began in the late nineteenth century in Thailand’s central plains, leading to the loss of nearly all the grassland and swamp areas that this deer depended on, and greatly fragmented what remained. Intensive hunting pressure at the turn of the 19th–20th century restricted the species further and it disappeared in the 1930s. Schomburgk’s Deer was prominent in the antlers sought by the Chinese medicine trade (Harper 1945). During the wet season, animals marooned on higher ground were hunted readily with spears from boats (Harper 1945), no doubt hastening the species' decline.

Conservation Actions [top]

Conservation Actions: As an extinct species there are no appropriate conservation measures. The indication that a remnant population might still survive (Schroering 1995 and in litt. as reported in Grubb 2005, MacPhee and Flemming 1999) was followed up by investigation, independently by several people, of Phongsali province, Lao PDR, by field survey and interview. This failed to find any further evidence of the species there or to elicit a consistent story of the origin of the antlers (Duckworth et al. 1999, per J.W. Duckworth in litt. 2008). Given regional trends in Schomburgk’s Deer’s sole known habitat, non-forest floodplains (its massive conversion to agriculture over the last 150 years) it is unlikely that the species could survive. However, any future indication of its existence should be followed up carefully. If by chance the species does survive, legislation giving it the highest levels of protection (in whatever country it was found), and an assessment of specific conservation needs would be imperative.

Citation: Duckworth, J.W., Robichaud, W. & Timmins, R. 2015. Rucervus schomburgki. The IUCN Red List of Threatened Species 2015: e.T4288A79818502. . Downloaded on 25 November 2015.
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