Journal of Threatened Taxa | www.threatenedtaxa.org | 26 August
2019 | 11(10): 14377–14380
Some
recent evidence of the presence of the Critically Endangered Gyps
vulture populations in northern Shan State, Myanmar
Sai Sein Lin Oo ¹,
Nang Lao Kham ², Kyaw Myo Naing ³ & Swen C. Renner
⁴
¹ Department of Zoology, University of Mandalay, 05032
Maha Aung Myay Township, Mandalay, Myanmar.
² Department of Zoology, Lashio University, 06031
Lashio, Shan State, Myanmar.
³ Department of Zoology, Pathein University, 10014
Pathein Township, Ayeyarwady, Myanmar.
⁴ Ornithology, Natural History Museum Vienna, Burgring
7, 1080 Vienna, Austria.
1 seinlinu@gmail.com,
2 laokham01@gmail.com, 3 kyawmyonaing77@gmail.com, 4
swen.renner@gmail.com (corresponding author)
doi: https://doi.org/10.11609/jott.4886.11.10.14377-14380 | ZooBank:
urn:lsid:zoobank.org:pub:1F3AE954-26E0-4092-8113-F80FEB32B840
Editor: Chris Bowden, The Royal Society
for the Protection of Birds, Sandy, UK. Date
of publication: 26 August 2019 (online & print)
Manuscript details: #4886 | Received 12 February
2019 | Final received 10 May 2019 | Finally accepted 31 July 2019
Citation: Oo, S.S.L, N.L. Kham, K.M. Naing
& S.C. Renner (2019). Some recent evidence of the presence of the Critically
Endangered Gyps vulture populations in northern Shan State, Myanmar. Journal of Threatened Taxa 11(10): 14377–14380. https://doi.org/10.11609/jott.4886.11.10.14377-14380
Copyright: © Oo et al. 2019. Creative Commons Attribution
4.0 International License. JoTT allows
unrestricted use, reproduction, and distribution of this article in any medium
by adequate credit to the author(s) and the source of publication.
Funding: Self funded.
Competing
interests: The authors declare no competing
interests.
Acknowledgements: The authors are grateful to U Sai Win Khaing (Mong Yai) for financial
support and also for transportation during the field study. Our thanks also go to Sai Lon for helping
during the field trip.
Four species of vultures are found in Myanmar, namely,
Sarcogyps calvus Red-headed Vulture, Gyps bengalensis White-rumped
Vulture, G. tenuirostris Slender-billed Vulture, and G. himalayensis
Himalayan Vulture (Htin Hla et al. 2011).
Of these, the latter three are present in Kachin, Shan State and Sagaing
Region (Tordoff et al. 2007; Htin Hla et al. 2011; Shwe & Aung 2016), and G.
himalayensis is additionally observed in Chin State (Htin Hla et al. 2011).
Gyps bengalensis was abundant in Myanmar and
considered as the most common vulture in Myanmar throughout the plains in the
early 20th Century (Smythies 2001; Naing et al. 2012). The population of vultures decrease in many
parts of their former distribution ranges has been generally attributed to food
shortage, chemical poisoning (i.e., diclofenac), and other human impact. Consequently, the population size decreased
(Robson et al. 1998; BANCA 2007; Tordoff et al. 2007; Htin Hla et al. 2011;
Shwe & Aung 2016), and the more recent status remains uncertain for all
four species for most of the country (Pain et al. 2003, 2008).
On 27 November 2018, we observed a flock of G.
bengalensis (Critically Endangered; BirdLife International 2017), G.
tenuirostris (Critically Endangered; Birdlife International 2016b), and G.
himalayanensis (Near Threatened; BirdLife International 2016a), in Man Sant
Village, Mong Yai Township, Northern Shan State, Myanmar (22.43°N, 97.92°E; see
map). The flock was feeding on the
carcass of cattle (likely accidental death).
The most notable feature of our observation was the presence of G.
bengalensis and G. tenuirostris: we could observe as many as 38
vultures of three species (G. bengalensis: 31, including six juveniles; G.
tenuirostris: 5; G. himalayensis: 2).
The vulture flock departed westwards three days after
they completely consumed the carcass.
The local people were apparently familiar with vultures, informed us
that they also occur in Nar Ma Lan Village, Nam Lan Village and Ho Ti Village,
all of which are located within a 15-km radius from Man Sant Village.
Unfortunately, we failed to observe any nests or
nesting sites of the flock. The local
people confirmed frequent observations of the three species from April to May
(the local breeding season according to the information we obtained from the
locals; October to March after Robson 2011) in the area of interest,
particularly before monsoon, indicating possible breeding attempts in the area.
Htin Hla et al. (2011) reported G. bengalensis
as more abundant than G. tenuirostris during their survey in Chin State,
Kachin State, and Shan State.
Additionally, they also stated that G. bengalensis were recorded
regularly associating with other vulture species in Myanmar (1997 to
2006). In Shan and Chin states, G.
bengalensis was regarded as the most common vulture species in the early 20th
Century (Rippon 1901), but was hardly reported in recent decades (Sayer &
Han 1983; Htin Hla 2003; Bezuijen et al. 2010).
Although the current population status of G. bengalensis in these
states is not known, Htin Hla et al. (2011) estimated a minimum of 62
individuals during surveys in 2006 and 2007.
They also estimated that the overall population of vultures in Myanmar
was at least 136 individuals. Congruent
with these observations, Tordoff et al. (2007) reported G. bengalensis
with a daily maximum of 62, along with 12 G. tenuirostris in the Kamaing
area, Kachin State.
Using open interviews questions, we also recorded
information on the beliefs of some local villagers; the locals use body parts
(especially bones) of vultures for belief-based use. Shwe & Aung (2016) found the vulture bone
trade in southern Shan State as a significant challenge for vulture
conservation. Similarly, feathers,
bones, meat, beak, claws, faeces and internal organs of vultures have been used
as traditional ‘medicine’ since ancient times in China (Leung 2006). Many Myanmar do not have a positive attitude
towards vultures, but the local people informed us that they avoided consumption
of vultures or their parts, because they are considered disgusting (in taste)
and have a putrid odour. Additionally,
as in Nepalese communities, many people assume that vultures are a bad omen and
bring ruin or bad luck, because vultures are associated with death (Baral &
Gautam 2007).
Threats to vulture populations in Myanmar are
manifold; but the major threats are nest destruction (tree), poisoning (poison
baits targeting other species such as mammals) and low food supply (Htin Hla et
al. 2011). Contrasting with many sites
in India, diclofenac has not been documented so far for Maing Yaw Village,
Lashio, Naung Pho Mae Village, Shan State, Naung Kwin, Indawgyi Lake, or Kachin
State (Htin Hla et al. 2011; Shwe & Aung 2016). Congruent with this observation, the township
medical officer of the Livestock Breeding and Veterinary Department in Shan
State informed us that the practice of using veterinary diclofenac is absent
for cattle treatment in the township (Dr. Soe Naing Win, pers. comm. 2018),
while diclofenac is used by many veterinarians widely in Myanmar (Bowden
2019). Although G. bengalensis
and G. tenuirostris were distributed in most of the Indian subcontinent
and southeastern Asia, its population declined rapidly in the 1990s and 2000s
(Bildstein 2017). Bildstein (2017)
indicated a decline of over 95% of the entire population in a rough
estimation. Our recording of several
juveniles suggests breeding may well occur in Myanmar although the dispersal
range of vultures is huge.
We recommend further surveys of the vultures in the
region, paying particular attention to locating any breeding attempts for all
three species. Finally, food is likely
the limiting factor for vulture populations in Myanmar (Bowden 2019), hence
maintaining uncontaminated food resources to support the local population
should be beneficial.
For
figure & images – click here
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