A conservation status survey of hornbills (Bucerotidae) in the Western Ghats, India

The Western Ghats biodiversity hotspot in India is threatened by habitat loss and fragmentation, which is likely to impact large-bodied, wide-ranging species with specialised requirements such as hornbills. In this survey along the Western Ghats, we surveyed for four hornbill species that occur here: Malabar Pied Hornbill Anthracoceros coronatus, and Indian Grey Hornbill Ocyceros birostris (endemic to South Asia), Malabar Grey Hornbill Ocyceros griseus (endemic to the Western Ghats), and the Great Hornbill Buceros bicornis. We visited 45 localities across five states: Maharashtra, Goa, Karnataka, Kerala, and Tamil Nadu. These included 26 wildlife sanctuaries, 5 national parks, 13 reserved forests, and one plantation landscape. Across sites, we walked 80 transect surveys totalling a length of 286.4 km. In all, 631 individual hornbills (412 detections) were recorded across 35 localities. The Malabar Grey Hornbill was most frequently detected, and widely-distributed, followed by the Great,...

印度西高止山脉（Western Ghats）生物多样性热点地区正面临栖息地丧失与片段化的威胁，这一威胁极有可能对具备特殊生存需求的大型广域分布物种造成负面影响，例如犀鸟（hornbill）。在本次沿西高止山脉开展的调查中，我们针对当地分布的4种犀鸟开展了调研：马拉巴尔斑犀鸟（Malabar Pied Hornbill，Anthracoceros coronatus）、印度灰犀鸟（Indian Grey Hornbill，Ocyceros birostris，南亚特有种）、马拉巴尔灰犀鸟（Malabar Grey Hornbill，Ocyceros griseus，西高止山脉特有种）以及双角犀鸟（Great Hornbill，Buceros bicornis）。我们走访了覆盖马哈拉施特拉邦（Maharashtra）、果阿邦（Goa）、卡纳塔克邦（Karnataka）、喀拉拉邦（Kerala）与泰米尔纳德邦（Tamil Nadu）5个邦的45处调查点位，其中包含26处野生动物保护区、5座国家公园、13处保留林以及1处人工种植园景观。各点位累计开展80条样线调查，总调查里程达286.4千米。总计在35处调查点位记录到631只犀鸟个体，有效检出记录共412次。其中马拉巴尔灰犀鸟的检出频次最高、分布范围最广，其次为双角犀鸟，……