Geissmann, T., and Nguyen The Cuong (2009). Results of a rapid gibbon survey in the Lung Ri area (Trung Khanh district, Cao Bang province) in northeastern Vietnam. Fauna and Flora International (FFI), Vietnam Programme, Hanoi, 9 pp.
Thomas Geissmann1, and
Nguyen The Cuong2
1 Anthropological Institute, University Zürich-Irchel,
Winterthurerstr. 190, CH-8057 Zürich, Switzerland
E-mail: thomas.geissmann@aim.uzh.ch
2 FFI - Vietnam Primate Programme,
340 Nghi Tam, Tay Ho, Hanoi, Vietnam
Email: cuong.the.nguyen@fauna-flora.org
Abstract: The cao-vit crested gibbon (Nomascus nasutus) is one of the
world's most endangered primate species, with one single protected forest patch supporting
the last known population. In response to a report of a possible gibbon call having
been heard in April 2009 about 5 km to the southwest of the protected gibbon habitat,
we carried out a brief survey of the area in question. The habitat consisted of steep
karst hills covered with secondary forest and shrubs, and valleys used for agriculture.
However, some small strips of karst forest contained enough trees that they might
support a gibbon group. During two days of field survey, no gibbons were seen, or
heard calling, and the interview data we collected did not provide any recent evidence
for the occurrence of gibbons in the area around Lung Ri. Although we found no evidence
that gibbons occur in the Lung Ri area, the occurrence of gibbons there cannot be
excluded due to the short duration of this study.
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