Nomascus nasutus (E. black crested gibbon) Includes Nomascus hainanus A.R. Mootnick, et al. "The status of the Hainan gibbon Nomascus hainanus and the Eastern black gibbon Nomascus nasutus." International Zoo Yearbook, vol. 46, no. 1, 6 July 2011. ZSL Publications, doi.org/10.1111/j.1748-1090.2011.00139.x. Accessed 7 Aug. 2018. Bryant, JV. Developing a conservation evidence-base for the Critically Endangered Hainan gibbon ('Nomascus hainanus'). 2014. U College London, PhD dissertation. UCL Discovery, discovery.ucl.ac.uk/1434514/. Accessed 7 Aug. 2018. Chan Bosco Pui Lok, et al. "REDISCOVERY OF THE CRITICALLY ENDANGERED EASTERN BLACK CRESTED GIBBON Nomascus nasutus (HYLOBATIDAE) IN CHINA,WITH PRELIMINARY NOTES ON POPULATION SIZE, ECOLOGY AND CONSERVATION STATUS." Asian Primates Journal, PDF ed., vol. 1, no. 1, 2008, pp. 17-25. Fan P., et al. "Social Structure and Group Dynamics of the Cao Vit Gibbon (Nomascus nasutus) in Bangliang, Jingxi, China." Folia Primatologica, vol. 81, 2010, pp. 245-53, doi.org/10.1159/000322351. Accessed 7 Aug. 2018. Hanlan Fei, et al. "Feeding Postures of Cao Vit Gibbons (Nomascus nasutus) Living in a Low-Canopy Karst Forest." International Journal of Primatology, vol. 36, no. 5, Oct. 2015, pp. 1036-54, link.springer.com/article/10.1007/s10764-015-9871-z. Accessed 7 Aug. 2018. Han-Lan Fei, et al. "Sleeping Tree Selection of Cao Vit Gibbon (Nomascus nasutus) Living in Degraded Karst Forest in Bangliang, Jingxi, China." American Journal of Primatology, vol. 74, no. 11, 5 July 2012. Wiley Online Library, doi.org/10.1002/ajp.22049. Accessed 7 Aug. 2018. Huaiqing Deng, et al. "Sound Spectrum Characteristics of Songs of Hainan Gibbon (Nomascus hainanus)." International Journal of Primatology, vol. 35, no. 2, Apr. 2014, pp. 547-56, link.springer.com/article/10.1007/s10764-014-9767-3. Accessed 7 Aug. 2018. ---. "Recovery of the Critically Endangered Hainan gibbon Nomascus hainanus." Fauna & Flora International, vol. 51, no. 1, Jan. 2017, pp. 161-65, doi.org/10.1017/S0030605315000678. Accessed 7 Aug. 2018. Jessica V. Bryant, et al. "Detection of a New Hainan Gibbon (Nomascus hainanus) Group Using Acoustic Call Playback." International Journal of Primatology, vol. 37, nos. 4-5, Oct. 2016, pp. 534-47, link.springer.com/article/10.1007/s10764-016-9919-8. Accessed 7 Aug. 2018. Jiang Zhou, et al. "Reproductive Characters and Mating Behaviour of Wild Nomascus hainanus." International Journal of Primates, vol. 29, no. 4, Aug. 2008, pp. 1037-46, link.springer.com/article/10.1007/s10764-008-9272-7. Accessed 7 Aug. 2018. John R. Fellowes, et al. "CURRENT STATUS OF THE HAINAN GIBBON (Nomascus hainanus): PROGRESS OF POPULATION MONITORING AND OTHER PRIORITY ACTIONS." Asian Primates Journal, PDF ed., vol. 1, no. 1, 2008, pp. 2-9. Jun-Juan Feng, et al. "Individuality and Stability in Male Songs of Cao Vit Gibbons (Nomascus nasutus) with Potential to Monitor Population Dynamics." PLoS ONE, vol. 9, no. 5, 2 May 2014, doi.org/10.1371/journal.pone.0096317. Accessed 7 Aug. 2018. Li ZhiGang, et al. "Mitochondrial DNA D-loop sequence analysis and population rejuvenation of Hainan gibbons (Nomascus hainanus)." Biodiversity Science, vol. 18, no. 5, 2010, pp. 523-27. CAB Direct, DOI:10.3724/SP.J.1003.2010.523. Accessed 7 Aug. 2018. Mingxia Zhang, et al. "Degradation of tropical forest in Hainan, China, 1991–2008: Conservation implications for Hainan Gibbon (Nomascus hainanus)." Biological Conservation, vol. 143, no. 6, June 2010, pp. 1397-404. ScienceDirect, doi.org/10.1016/j.biocon.2010.03.014. Accessed 7 Aug. 2018. Peng-Fei Fan, et al. "Habitat evaluation and population viability analysis of the last population of cao vit gibbon (Nomascus nasutus): Implications for conservation." Biological Conservation, vol. 161, May 2013, pp. 39-47. ScienceDirect, doi.org/10.1016/j.biocon.2013.02.014. Accessed 7 Aug. 2018. Peng-fei Fan, et al. "Behavioral Responses of Cao Vit Gibbon (Nomascus Nasutus) to Variations in Food Abundance and Temperature in Bangliang, Jingxi, China." American Journal of Primatology, vol. 74, no. 7, 2 May 2012. Wiley Online Library, doi.org/10.1002/ajp.22016. Accessed 7 Aug. 2018. Peng-Fei Fan, et al. "Habitat and food choice of the critically endangered cao vit gibbon (Nomascus nasutus) in China: Implications for conservation." Biological Conservation, vol. 144, no. 9, Sept. 2011, pp. 2247-54. ScienceDirect, doi.org/10.1016/j.biocon.2011.05.016. Accessed 7 Aug. 2018. Pengfei FAN, et al. "Locomotion behavior of cao vit gibbon (Nomascus nasutus) living in karst forest in Bangliang Nature Reserve, Guangxi, China." Integrative Zoology, vol. 8, no. 4, 31 Oct. 2012. Wiley Online Library, doi.org/10.1111/j.1749-4877.2012.00300.x. Accessed 7 Aug. 2018. Peng-Fei Fan, et al. "Understanding stable bi-female grouping in gibbons: feeding competition and reproductive success." Frontiers in Zoology, vol. 12, no. 1, 5 Mar. 2015. Gale Virtual Reference Library. Accessed 7 Aug. 2018. Wu Wei, et al. "The current status of the Hainan black-crested gibbon Nomascus sp. cf. nasutus hainanus in Bawangling National Nature Reserve, Hainan, China." Fauna & Flora International, vol. 38, no. 4, Oct. 2004, pp. 452-56. Oryx, doi.org/10.1017/S0030605304000845. Accessed 7 Aug. 2018. Zhang, Z., & Zang R., (2018). Diversity and distribution of food plants: Implications for conservation of the critically endangered Hainan gibbon. Nature Conservation, 31:17-33. Nie, W., et al. (2018). Species identification of crested gibbons (Nomascus) in captivity in China using karyotyping- and PCR-based approaches. Zoological Research, 39.4:1-9. DOI: 10.24272/j.issn.2095-8137.2018.036 Caspar, K.R., et al. (2018). Captive gibbons (Hylobatidae) use different referential cues in an object- choice task: insights into lesser ape cognition and manual laterality. PeerJ, 4.5348. DOI: 10.7717/peerj.5348. Guan, Z., et al. (2018). Ecology and social system of northern gibbons living in cold seasonal forests. Zoological Research, 39.4:255-265. DOI: 10.24272/J.ISSN.2095-8137.2018.045 .