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This project was funded by an Impact Accelleration grant from the UK Engineering and Physical Sciences Research Council. Cornelia and David created the content. We are grateful to many others for advice and feedback, including Drs Eric Rexstad, Susan Cheyne, Camille Coudrat, Ollie Wearn, Warren Brockleman and others.

Content Creators

Dr. Cornelia Oedekoven

I am a senior research fellow in ecological statistics at the University of St Andrews. My research interests are in developing and applying methods for quantitative assessment of wildlife populations:

  • Estimating abundance: how many are there?

  • Survey design: how do I count them?

  • Animal movement: where do they go?

  • Human impact: how are we affecting them?

For more about me, check out my website: 

Cornelia Oedekoven (

Me Namibian desert.jpg

Prof. David Borchers

I'm a statistician at the University of St Andrews, specialising in developing statistical methods to address questions in ecology using survey data. I have a particular interest in spatial capture-recapture (SCR) methods, and together with collaborators listed below, in developing effective acoustic SCR methods.



Dr. Susan M. Cheyne

I have worked in Asia since 1997 and in Indonesia since 2002. I have a focus on primate ecology and conservation looking into the illegal pet trade of gibbons and studying the rehabilitation and reintroduction successes of these threatened apes as well as focusing on conservation research to inform actions for small ape conservation. Since 2015 I am the Vice-Chair of the IUCN Species Survival Commission Primate Specialist Group Section on Small Apes ( The main functions of the SSA are aiding communication between gibbon experts worldwide, providing digital resources and practical help to conservation and education projects, provide help and resources and monitor and evaluate gibbon distributions and populations. Gibbons are relatively unknown and little understood, so we raise public awareness of their needs, traits, and threats.


Susan and GPS.jpeg

Dr. Camille N. Z. Coudrat

Camille is the founder and director of Association Anoulak (, dedicated to the conservation of biodiversity and human communities resilience in the Annamite Mountains of Laos. Association Anoulak mainly works in Nakai-Nam Theun National Park, a priority for biodiversity conservation at the national, regional and global levels. Association Anoulak implements activities on (i) Biodiversity research and monitoring for conservation, (ii) Community anti-poaching patrols, (iii) Community sustainable and alternative livelihoods, (iv) Conservation awareness.
One of the research interests of Camille includes Gibbons and being able to implement gibbon population surveys and monitoring in priority areas in Laos. As part of this project Camille is collaborating with CREEM.


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Dr. Oliver Wearn

I'm a conservation biologist with academic and applied experience across the tropics, in particular focussing on surveys for rare and threatened species. I currently work for Fauna & Flora International in Vietnam as a Senior Technical Advisor, and in that capacity have led a number of gibbon population surveys across the country. I am therefore excited to be involved in this project to develop and refine acoustic SCR methods for surveying gibbons. For more about my work, I can be followed on Twitter or ResearchGate.

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