The Brown Hornbill (Anorrhinus austeni), a Near Threatened frugivore, reaches the northern edge of its distribution in southern Yunnan, China, yet breeding had not been previously documented with site-attributed nests in the country. In April and May 2025, we documented two active nests in the Mengman sector of the Shangyong Protected Area, separated by ~3.5 km. Both involved sealed incubation or brooding by females attended by multiple males, providing the first definitive evidence of cooperative breeding in the species in China. One cavity occurred in a tall Choerospondias axillaris tree and was provisioned with Dysoxylum gotadhora and D. binectariferum fruits, together with insect prey such as mantis and cicadas. The other was in a tall Terminalia myriocarpa tree beside a stream gully, with food deliveries including Ormosia hosiei and Pometia tomentosa fruits. Taken together, these observations establish that A. austeni breeds in China, broaden knowledge of nest tree substrates and diet in this frontier population, and confirm that cooperative social systems persist at the species' northern range limit. Alongside recent records of Oriental Pied (Anthracoceros albirostris) and Great Hornbills (Buceros bicornis), these findings demonstrate that Shangyong sustains a multi-species hornbill guild. Safeguarding cavity-bearing trees, strengthening systematic monitoring, and enhancing transboundary cooperation with Laos are essential to secure these disturbance-sensitive frugivores at the landscape scale.
| [1] |
Bora, B., D. Sonowal, N. Khakhlari, and A. Datta. 2023. “The Breeding Biology of the Cooperatively Breeding White-Throated Brown Hornbill (Anorrhinus austeni).” Hornbill Natural History and Conservation 4: 1–19.
|
| [2] |
Cao, M., and J. Zhang. 1997. “Tree Species Diversity of Tropical Forest Vegetation in Xishuangbanna, SW China.” Biodiversity & Conservation 6: 995–1006.
|
| [3] |
Cao, M., X. Zou, M. Warren, and H. Zhu. 2006. “Tropical Forests of Xishuangbanna. China.” Biotropica 38: 306–309.
|
| [4] |
Cockburn, A. 1998. “Evolution of Helping Behavior in Cooperatively Breeding Birds.” Annual Review of Ecology and Systematics 29: 141–177.
|
| [5] |
Cockburn, A. 2006. “Prevalence of Different Modes of Parental Care in Birds.” Proceedings of the Royal Society B: Biological Sciences 273: 1375–1383.
|
| [6] |
Davis, E. O., and J. A. Glikman. 2020. “An Assessment of Wildlife Use by Northern Laos Nationals.” Animals 10: 685.
|
| [7] |
Duckworth, W., R. E. Salter, and K. Khounboline. 1999. Wildlife in Lao PDR: 1999 Status Report. World Conservation Union Gland.
|
| [8] |
Gonzalez, J. C. T., B. C. Sheldon, N. J. Collar, and J. A. Tobias. 2013. “A Comprehensive Molecular Phylogeny for the Hornbills (Aves: Bucerotidae).” Molecular Phylogenetics and Evolution 67: 468–483.
|
| [9] |
Gray, T. N. E., A. C. Hughes, W. F. Laurance, et al. 2018. “The Wildlife Snaring Crisis: An Insidious and Pervasive Threat to Biodiversity in Southeast Asia.” Biodiversity and Conservation 27: 1031–1037.
|
| [10] |
Huang, Z., Y. Bai, J. M. Alatalo, and Z. Yang. 2020. “Mapping Biodiversity Conservation Priorities for Protected Areas: A Case Study in Xishuangbanna Tropical Area, China.” Biological Conservation 249: 108741.
|
| [11] |
James, D. A., A. Bachan, and R. Kannan. 2011. “Installation of Artificial Nest Cavities for the Endangered Great Hornbill: A Pilot Study in Southern India.” Raffles Bulletin of Zoology 24: 73–76.
|
| [12] |
Jerdon, T. C. 1872. “Supplementary Notes on the Birds of India.” Ibis (Third Series) 2: 6.
|
| [13] |
Kemp, A. C., and P. F. D. Boesman. 2020. “Brown Hornbill (Anorrhinus austeni), version 1.0.” In Birds of the World, edited by J. Del Hoyo, A. Elliott, J. Sargatal, D. A. Christie and E. De Juana, Cornell Lab of Ornithology.
|
| [14] |
Kinnaird, M. F., and T. G. O'brien. 2007. The Ecology and Conservation of Asian hornbills: Farmers of the Forest. University of Chicago Press.
|
| [15] |
Kinnaird, M. F., E. W. Sanderson, T. G. O'Brien, H. T. Wibisono, and G. Woolmer. 2003. “Deforestation Trends in a Tropical Landscape and Implications for Endangered Large Mammals.” Conservation Biology 17: 245–257.
|
| [16] |
Kitamura, S. 2011. “Frugivory and Seed Dispersal by Hornbills (Bucerotidae) in Tropical Forests.” Acta Oecologica 37: 531–541.
|
| [17] |
Naniwadekar, R., C. Mishra, and A. Datta. 2015. “Fruit Resource Tracking by Hornbill Species at Multiple Scales in a Tropical Forest in India.” Journal of Tropical Ecology 31: 477–490.
|
| [18] |
Pasuwan, C., P. Thiensongrusamee, N. Da-U- re, et al. 2022. “Long-Term Monitoring of Breeding Successes of Great Hornbill (Buceros bicornis) and Rhinoceros Hornbill (Buceros rhinoceros) Using Artificial Nest Boxes in Budo-Su-Ngai Padi National Park, Thailand.” Avian Conservation and Ecology 17: art47.
|
| [19] |
Poonswad, P., and A. Tsuji. 1994. “Ranges of Males of the Great Hornbill Buceros bicornis, brown hornbill Ptilolaemus tickelli and Wreathed Hornbill Rhyticeros undulatus in Khao Yai National Park, Thailand.” Ibis 136: 79–86.
|
| [20] |
Shonfield, J., and E. M. Bayne. 2017. “Autonomous Recording Units in Avian Ecological Research: Current Use and Future Applications.” Avian Conservation & Ecology 12: 14.
|
| [21] |
Wang, L., B. Yang, Y. Bai, et al. 2021. “Conservation Planning on China's Borders With Myanmar, Laos, and Vietnam.” Conservation Biology 35: 1797–1808.
|
| [22] |
Wearn, O. R., and P. Glover-Kapfer. 2017. “Camera-Trapping for Conservation: A Guide to Best-Practices.” WWF Conservation Technology Series 1: 181.
|
| [23] |
Xishuangbanna Nature Reserve Comprehensive Survey, G1987. Comprehensive Survey Report of Xishuangbanna Nature Reserve [in Chinese]. Yunnan Science and Technology Press.
|
| [24] |
Yang, D. 1993. Animals of Xishuangbanna [in Chinese]. Yunnan University Press.
|
| [25] |
Yunnan Provincial Local Gazetteers Editorial, C. 1989. Yunnan Provincial Gazetteer: Animals [in Chinese]. Yunnan Provincial Local Gazetteers Editorial Committee.
|
| [26] |
Zheng, G. 2023. Classification and Distribution of Chinese Birds [in Chinese]. Science Press.
|
| [27] |
Zheng, G. M. 2011. A Checklist on the Classification and Distribution of the Birds of China [in Chinese], 2nd edn.Science Press.
|
| [28] |
Zheng, Z. X., and B. X. Zheng. 1961. “A Report on the Bird Species Survey of the Xishuangbanna Region of Southern Yunnan and Its Adjacent Areas” [in Chinese]. Acta Zoologica Sinica 13: 1–20.
|
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2026 The Author(s). Integrative Conservation published by John Wiley & Sons Australia, Ltd on behalf of Xishuangbanna Tropical Botanical Garden (XTBG).
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