The plight of the Critically Endangered Helmeted Hornbill Rhinoplax vigil needs no introduction to birdwatchers and ornithologists with an interest in Asian birds. Despite having a wide distribution spanning five countries—Brunei, Indonesia (Sumatra, Kalimantan), Malaysia (Peninsular, Sabah and Sarawak), Myanmar and Thailand (BirdLife International 2018)—this bird has suffered one of the fastest declines of any avian species in Asia in recent years, with the possible exception of Gyps vultures and the Straw-headed Bulbul Pycnonotus zeylanicus. The causes have been very specific—the escalation in the trade of its solid reddish-orange casque (Collar 2015, Beastall et al. 2016, Bale 2018) superimposed on the well-established problem of degradation and destruction of its forest habitat. In 2015, Yok Yok Hadiprakarsa of the hornbill conservation organisation Rangkong Indonesia revealed the unprecedented and unsustainable levels of poaching from Kalimantan and brought the crisis to the attention of the international conservation community (Hii 2015). This was followed by a BirdingASIA article on Helmeted Hornbill (Collar 2015). Since then, bird conservationists have collaborated and worked hard to raise awareness of the issue, set up the IUCN Species Survival Commission (SSC) Helmeted Hornbill Working Group (a subgroup of the IUCN SSC Hornbill Specialist Group), and intensified national and international conservation efforts. Here we highlight some of the recent collaborative efforts on Helmeted Hornbill conservation by the BirdLife International Partnership, Planet Indonesia, Gaia, Wildlife Reserves Singapore and others, with the aim of inviting further collaboration and to synergise actions with other conservation efforts, including those for large mammals. Given the urgency of the issue, it is vital for concerted conservation effort to be implemented immediately.