Barney Long, Ph.D.

Senior Director of Conservation Strategies


Ph.D., Biodiversity Management, DICE, University of Kent at Canterbury

B.S. Zoology, University of Bristol

Dr. Barney Long works on the conservation of endangered mammal species and the thematic approaches required to achieve the recovery of their populations. He has worked extensively on Saola, Sumatran and Javan Rhino, Tiger, Gibbons, Doucs and a host of other species across the world. A focus of his work is protected area management effectiveness and the prevention of poaching.

Prior to joining Re:wild, Dr. Barney Long led the Species Program at WWF-US. Barney started his career in Southeast Asia exploring the region during baseline biodiversity inventory surveys and searching for presumed extinct primates. Initially using community-based and protected area approaches to conserve species, he expanded to the integration of species conservation within wider landscape and socio-economic development processes on which he conducted his doctoral research.

A key interest of Barney’s is how to raise the quality of implementation at scale through developing thematic approaches to improving protected area management effectiveness, the prevention of poaching, and species conservation and recovery planning. Barney is also a strong believer in the power of partnerships for conservation and works extensively with the IUCN Species Survival Commission, the SMART, Conservation Assured, and Zero Poaching partnerships.

Biggs, C., Long, B. & Rodríguez, J.P. (2023), Priorities for a coordinated effort on behalf of lost species: a commentary on Martin et al. (2023). Animal Conservation.

Cogoni, D., Grace, M.K., Long, B., Orsenigo, S., & Fenu, G. (2022). The IUCN Green Status of Species: A Call for Mediterranean Botanists to Contribute to This New Ambitious Effort. Plants: 11, 2592. https://

Grace, M.K., Akçakaya, H.R., Bennett, E.L., Boyle, M.J.W., Hilton-Taylor, C., Hoffmann, M., Money, D., Prohaska, A., Young, R., Young, R., & Long., B. (2022). The Impact of Spatial Delineation on the Assessment of Species Recovery Outcomes. Diversity: 14, 742. https://

Long, B., & Rodríguez, J. (2022). Lost but not forgotten: A new nomenclature to support a call to rediscover and conserve lost species. Oryx, 56(4), 481-482. doi:10.1017/S0030605322000618

Dancer, A., Keane, A., Beale, C. M., Dobson, A. D. M., Amin, R., Freeman, R., Imong, I., Jones, K., Linkie, M., Long, B., Okeke, F. O., Plumptre, A. J., Rowcliffe, J. M., Stokes, E. J., van der Westhuizen, E., & Collen, B. (2022). Evidence of deterrence from patrol data: Trialing application of a differenced-CPUE metric. Conservation Science and Practice, e12746.

Viollaz J., Rizzolo J.B., Long B., Trung C.T., Kempinski J., Rawson B.M., Reynald D., Quang H.X., Hien N.N., Dung C.T., Huyen H.T., Thuy Dung N.T., & Gore M.L. (2022) Potential for informal guardianship in community-based wildlife crime prevention: Insights from Vietnam. Nature Conservation 48: 123-147.

Redford, K. H., da Fonseca, G. A. B., Gascon, C., Rodriguez, C.M. Adams, J., Andelman, S., Barron, D.H., Batmanian, G., Bierbaum, R., Daszak, P., Daugherty, C., Griffin, J., Kemper, K., Lee, A., Long, B., Lovejoy, T.E., McCauley, D., Romanelli, C., Paxton, M., Sekhran, N., Walzer, C., Wannous, C., West, K., & Zambrana-Torrelio, C. 2022. Healthy planet healthy people. Conservation Letters. 2022;e12864. DOI: 10.1111/conl.12864

Grace, M., Bennett, E., Akçakaya, H., Hilton-Taylor, C., Hoffmann, M., Jenkins, R., Milner-Gulland, E.J., Nieto, A., Young, R.P., & Long, B. (2021). IUCN launches Green Status of Species: A new standard for species recovery. Oryx, 55(5), 651-652. doi:10.1017/S0030605321000880

Appleton, M.R., Barborak, J.R., Daltry, J.C., Long, B., O'Connell, M., Owen, N.R., Singh, R., Sparkes, E., Sterling, E.J., & Valencia, L.M. 2021. How should conservation be professionalized? Oryx, 1-10. DOI:10.1017/S0030605321000594

Rizzolo, J.B., Gore, M.L., Long, B., Cao Tiến, T., Kempinski J., Rawson B.M., Huyẽn T.H., & Viollaz J. 2021. Protected Area Rangers as Cultural Brokers? Implications for Wildlife Crime Prevention in Viet Nam. Frontiers in Conservation Science (2): 1-11. DOI: 10.3389/fcosc.2021.698731

Grace, M.K., Akçakaya, H.R., Bennett, E.L., Brooks, T.M., Heath, A., Hedges, S., Hilton-Taylor, C., Hoffmann, M., Hochkirch, A., Jenkins, R., Keith, D.A., Long, B., Mallon, D.P., Meijaard, E., Milner-Gulland, E.J., Rodriguez. J.P., Stephenson, P.J., Stuart, S.N., Young, R.P., et al. 2021. Testing a global standard for quantifying species recovery and assessing conservation impact. Conservation Biology. DOI: 10.1111/cobi.13756

Grace, M.K., Akçakaya, H.R., Bull, J.W., Carrero, C., Davies, K., Hedges, S., Hoffmann, M., Long, B., Lughadha, E.M.N., Martin, G.M., Pilkington, F., Rivers, M.C., Young, R.P., & Milner-Gulland, E.J. 2021. Building robust, practicable counterfactuals and scenarios to evaluate the impact of species conservation interventions using inferential approaches. Biological Conservation 261. DOI: 10.1016/j.biocon.2021.109259

Kennerley, R., Lacher, T.E., Hudson, M.A., Long, B., McCay, S., Roach, N.S., Turvey, S.T., & Young, R.P. 2021. Global patterns of extinction risk and conservation needs for Rodentia and Eulipotyphla. Diversity and Distributions. DOI: 10.1111/ddi.13368

Lacher, T.E., Kennerley, R., Long, B., McCay, S., Roach, N.S., Turvey, S.T., & Young, R.P. 2021. Support for rodent ecology and conservation to advance zoonotic disease research. Conservation Biology 35:4:1061-1062. DOI: 10.1111/cobi.13763

Grace, M.K., Timmins, H., Bennett, E.L., Long, B., Milner-Gulland, E.J., & Dudley, N. 2021. Engaging End-Users to Maximise Uptake and Effectiveness of a New Species Recovery Assessment: The IUCN Green Status of Species. Conservation & Society 19(3): 150-160. DOI: 10.4103/cs.cs_195_20

Wiedenfeld, D.A., Alberts, A.C., Angulo, A., Bennett, E.L., Byers, O., Contreras-MacBeath, T., Drummond, G., da Fonseca, G.A.B., Gascon, C., Harrison, I., Heard, N., Hochkirch, A., Konstant, W., Langhammer, P.F., Langrand, O., Launay, F., Lebbin, D.J., Lieberman, S., Long, B., Zhi Lu, Maunder, M., Mittermeier, R.A., Molur, S., al Mubarak, R.K., Parr, M.J., Ratsimbazafy, J., Rhodin, A.G.,J., Rylands, A.B., Sanderson, J., Sechrest, W., Soorae, P., Supriatna, J., Upgren, A., Vié, J.,C., & Li Zhang. 2021. Conservation resource allocation, small population resiliency, and the fallacy of conservation triage. Conservation Biology 35 (5): 1388-1395. DOI: 10.1111/cobi.13696

Mair, L., Bennun, L.A., Brooks, T.M., Butchart , S.H.M., Bolam, F.C., Burgess, N.D., Ekstrom, J.M.M., Milner-Gulland, E.J., Hoffmann, M., Ma, K., Macfarlane, N.B.W., Raimondo, D.C., Rodrigues, A.S.L., Shen, X., Strassburg, B.B.N., Beatty, C.R., Gómez-Creutzberg , C., Iribarrem, A., Irmadhiany, M., Lacerda, E., Mattos, B.C., Parakkasi, K., Tognelli, M.F., Bennett, E.L., Bryan, C., Carbone, G., Chaudhary, A., Eiselin, M., da Fonseca, G.A.B., Galt, R., Geschke, A., Glew, L., Goedicke, R., Green, J.M.H., Gregory, R.D., Hill, S.H.H., Hole, D.G., Hughes, J., Hutton, J., Keijzer, M.P.W., Navarro, L.M., Lughadha, E.N., Plumptre, A.J., Puydarrieux, P., Possingham , H.P., Rankovic, A., Regan, E.C., Rondinini, C., Schneck, J.D., Siikamäki, J., Sendashonga, C., Seutin, G., Sinclair, S., Skowno, A.L., Soto-Navarro, C.A., Stuart, S.N., Temple, H.J., Vallier, A., Verones, F., Viana, L.R., Watson, J., Bezeng, S., Böhm , M., Burfield, I.J., Clausnitzer, V., Clubbe, C., Cox, N.A., Freyhof, J., Gerber, L.R., Hilton-Taylor, C., Jenkins, R., Joolia, A., Joppa, L.N., Pin Koh, L., Lacher, T.L., Langhammer, P.F., Long, B., Mallon, D., Pacifici, M., Polidoro, B.A., Pollock, C.M., Rivers, M.C., Roach, N.S., Rodríguez, J.P., Smart, J., Young, B.E., Hawkins, F., & McGowan, F.J.K. 2021. A metric for spatially explicit contributions to science-based species targets. Nature Ecology & Evolution. DOI: 10.1038/s41559-021-01432-0

Viollaz, J., Long, B., Cao Tiến, T. Kempinski, J., Rawson, B.M., Hoàng Xuân, Q, Nguyễn N.H., Nguyễn Thị, B.L Cao Tiến, D., Hoàng, T.H., McWhirter, R., Nguyễn Thị, T.D., & Gore, M.L. 2021. Using crime script analysis to understand wildlife poaching in Vietnam. Ambio DOI: 10.1007/s13280-020-01498-3

Singh, R., Galliers, C., Moreto, W., Slade, J., Long, B., Aisha., H. Wright, A., Cartwright, F., Deokar, A., Wyatt, A., Deokar, D., Phoonjampa, R., Smallwood, E., Aziz, R., Benoit, A.K., Cao, R., Willmore, S., Jayantha, D., & Ghosh, S. 2021. Impact of the COVID-19 pandemic on rangers and the role of rangers as a planetary health service. Parks: 27(Special Issue) 119-133. DOI: 10.2305/IUCN.CH.2021.PARKS-27-SIRS.en

Singh, R., Galliers, C., Appleton, M., Hoffmann, M., Long, B., Cary-Elwes., J., Fritze., C., McCallum., J., & Parry Jones, R. 2021. The vital role of rangers in conservation. Park Stewardship Forum 37(1): 128-136. DOI: 10.5070/P537151745

Appleton. M.R., Cary-Elwes., J., Fritze, C., Galliers., C., Long, B., Lawton, M., McCallum, J., Singh, R., & Stanciu, E., 2021. What will it take to professionalize rangers? Park Stewardship Forum 37(1): 174-184. DOI: 10.5070/P537151748

Dudley, N., Stolton, S., Pasha, M.K.S., Baltzer, M., Yap, W.L., Sharma, M., Long, B., Yadav, S.P., Gopal, R., Bonal, B.S., Kapoor, M., Roy, S., Paxton, M., Khadka, M., Bhatta, S.R. Chapagain, D., Stuart, C., Roberts, J., Verma, N., Wangdi, S., Penjor, U., Tandin, T., Dhakal, M., Oli, B.N. Tenzin, K., Peiq, L., Bose, J., Widodo, F.A., Novalina, R., Darmaraj, M.R., Hagir, R., Kostyria, A.V., Rafhan, H., Shrestha, M., Duangchantrasiri, S., Vinitpornsawan, S., Phoonjampa, R., & Boron, V. How effective are tiger conservation areas at managing their sites against the Conservation Assured | Tiger Standards (CA|TS)? Parks 26(2): 115-128. DOI: 0.2305/IUCN.CH.2020.PARKS‐26‐2ND.en

Singh, R., Gan, M., Barlow, C., Long, B., Mcvey, D., De Kock. R., Gajardo, O.B., Avino, F.S., & Belecky., M. 2020. What do rangers feel? Perceptions from Asia, Africa and Latin America. Parks: 26(1): 63-76. DOI: 10.2305/IUCN.CH.2020.PARKS‐26‐1RS.en

Hockings, M., Dudley, N., Elliot, W., Ferreira, N.M., MacKinnon, K., Pasha, M.K.S., Phillips, A., Stolton, S., Woodley, S., Appleton, M., Chassot, O., Fitzsimons, J., Galliers, C., Kroner, R.G., Goodrich, J., Hopkins, J., Jackson, W., Jonas, H., Long, B., Mumba, M., Parrish, J., Paxton, M., Phua, C., Plowright, R., Rao, M., Redford, K., Robinson, J., Rodríguez, C.M., Sandwith, T., Spenceley. A., Stevens, C., Tabor, C., 31, Troëng, S., Willmore, S., Yang, A., COVID-19 and Protected and Conserved Areas. Parks: 26: 7-24. DOI: 10.2305/IUCN.CH.2020.PARKS‐26‐1MH.en

Grace, M, Akçakaya, H.R., Bennett, E., Hilton-Taylor, C., Long, B., Milner-Gulland, E.J., Young, R., Hoffmann, M. 2019. Using historical and paleoecological data to inform ambitious species recovery targets. Philosophical Transactions of the Royal Society B: Biological Sciences. DOI: 10.1098/rstb.2019.0297.

Stephenson, P.J., Workman, C., Grace, M.K., & Long, B. 2020. Testing the IUCN Green List of Species. Oryx 54(1) 10-11 doi:10.1017/S0030605319001200

Akçakaya, H.R., Rodrigues, A.S.L., Keith, D.A., Milner‐Gulland, E.J., Sanderson, E.W., Hedges, S., Mallon, D.P., Grace, M.K., Long, B., Meijaard, E., Stephenson, P.J. 2019. Assessing ecological function in the context of species recovery. Conservation Biology. Doi:

Stephenson, P.J., Grace, M.K., Akçakaya, H.R., Rodrigues, A.S.L., Long, B., Mallon, D.P., Meijaard, E., Rodriguez, J.P., Young, R.P., Brooks, T.M. & Hilton-Taylor, C. 2019. Defining the indigenous ranges of species to account for geographic and taxonomic variation in the history of human impacts: reply to Sanderson 2019. Conservation Biology, 33(5): 1211–1213. DOI: 10.1111/cobi.13400

Hoffmann, M., Abramov, A., Duc, H., Trai, L., Long, B., Nguyen, A., Son, N., Rawson, B., Timmins, R., Bang, T. and Willcox, D. 2019. The status of wild canids (Canidae, Carnivora) in Vietnam. Journal of Threatened Taxa. 11, 8 (Jun. 2019), 13951-13959. DOI:

Long B., Schütz E., Burton A.J., Appleton M., Boyles R., de Leon J., Diamante G., Gonzalez A., Holland J., Lees C., Marandola E., Natural V.C., Pineda-David M.J., Salao C., Slade J., Tabaranza D.G., Tan E.H.P., Tiongson L., Young S. (2018). Review of tamaraw (Bubalus mindorensis) status and conservation actions. BULLetin 1: 18-34.

Akçakaya H.R., Bennett E.L., Brooks T.M., Grace M.K., Heath A., Hedges S., Hilton-Taylor C., Hoffmann M., Keith D.A., Long B., Mallon D.P., Meijaard E., Milner-Gulland E.J., Rodrigues A.S.L., Rodriguez J.P., Stephenson P.J., Stuart S.N., Young R.P. (2018). Quantifying species recovery and conservation success to develop an IUCN Green List of Species. _Conserv Bio_l. doi: 10.1111/cobi.13112.

Pasha M. K. S., Dudley, N., Stolton S., Baltzer M., Long B., Roy S., Belecky M., Gopal R., Yadav, S.P. 2018. Setting and Implementing Standards for Management of Wild Tigers. Land 2018, 7(3), 93;

Stephenson P.J., Brooks T.M., Butchart S.H.M., Fegraus E., Geller E.N., Hoft R., Hutton J., Kingston N., Long B., and McRae L. 2017. Priorities for big biodiversity data. Frontiers in Ecology and the Environment 15(3) 124-125. DOI: 10.1002/fee.1473.

Setiawan R., Gerber B.D., Rahman U.M., Daryan D., Firdaus A.Y., Haryono M., Khairani K.O., Kurniawan Y., Long B., Lyet A., Muhiban M., Mahmud R., Muhtarom A., Purastuti E., Ramono W.S., Subrata D., and Sunarto. 2017. Preventing Global Extinction of the Javan Rhino: Tsunami Risk and Future Conservation Direction. Conservation Letters 10(3) 1-9. DOI: 10.1111/conl.12366.

Gray T. N. E., Crouthers R., Ramesh K., Vattakaven J., Borah J., Pasha M.K.S., Lim T., Phan, C., Singh R., Long, B., Chapman S., Keo O., and Baltzer M. 2017. A framework for assessing readiness for tiger Panthera tigris reintroduction: a case study from eastern Cambodia. Biodiversity Conservation. DOI: 10.1007/s10531-017-1365-1.

Moreto W.D., Gau J.M., Paoline III E.A., Singh R., Belecky M., and Long B. 2017. Occupational motivation and intergenerational linkages of rangers in Asia. Oryx. DOI: 10.1017/S0030605317001041.

Tilker A., Long B., Gray T., Robichaud W., Van Ngoc T., Vu Linh N., Holland J., Shurter S., Comizzo P., Thomas P., Ratajszczak R., and Burton J. 2017. Saving the saola from extinction. Science: Vol. 357 (6357), pp. 1248. DOI: 10.1126/science.aap9591.

Gray T. N. E., Hughes A.C., Laurance W.F, Long B., Lynam A.J., O’Kelly H., Ripple W.J., Seng T., Scotson L., and Wilkinson N.M. The wildlife snaring crisis: an insidious and pervasive threat to biodiversity in Southeast Asia. Biodiversity Conservation. DOI: 10.1007/s10531-017-1450-5.

Gray, T.N.E., Lynam, A.J., Teak, S., Laurance, W.F., Long, B., Scotson, L., and Ripple, W.J. 2017. Wildlife-snaring crisis in Asian forests. Science Vol. 355: 6322, 255-256. DOI: 10.1126/science.aal4463.

Haryono, Muh., Miller, P.S., Lees, C., Ramono, W., Purnomo, A., Long, B., Sectionov, Waladi Isnan, B.D., Aji, B.D., Talukdar, B., and Ellis, S. (Eds.) 2016. Population and Habitat Viability Assessment for the Javan Rhino. Apple Valley, MN: IUCN/SSC Conservation Breeding Specialist Group.

Long, B., Grein, G., Boedicker, N., and Singh, R. 2016. Are ranger adequately protected by insurance schemes? Parks 22(2): 83-93. 10.2305/IUCN.CH.2016.PARKS-22-2BL.en.

Havmøller, R.G., Payne J., Ramono W., Ellis S., Yognand K., Long B., Dinerstein E., Williams A.C., Putra R. Gawi J., Talukdar B.K., and Burgess N. 2015. Will current conservation responses save the Critically Endangered Sumatran rhinoceros Dicerorhinus Sumatrensis? Oryx, available on CJO2015. doi:10.1017/S0030605315000472.

Robichaud, W. and Long B. 2014. Saola Pseudoryx nghetinhensis. In: Ecology, Evolution and Behaviour of Wild Cattle, Implications for Conservation. Eds: Melletti, M. and Burton, J. Cambridge University Press, Cambridge.

Brook S.M., Dudley N., Mahood S.P., Polet G., Williams A.C., Duckworth J.W., Ngoc T.V. & Long B. 2014. Lessons learned from the loss of a flagship: The extinction of the Javan rhinoceros Rhinoceros sondaicus annamiticus from Vietnam. Biological Conservation, 174, 21–29.

Jiang G.S., Sun H.Y., Lang J.M., Yang L.J., Li C., Lyet A., Long B., Miquelle D.G., Zhang C.Z., Aramilev S., Ma J.Z., and Zhang M.H. 2014. Effects of environmental and anthropogenic drivers on Amur tiger distribution in northeastern China. Ecological Restoration 29(5): 801–813.

Barber-Meyer S. M., Jnawali S. R., Karki J. B., Khanal P., Lohani S., Long B., MacKenzie D. I., Pandav B., Pradhan N. M. B., Shrestha R., Subedi N., Thapa G., Thapa K. and Wikramanayake E. 2013. Influence of prey depletion and human disturbance on tiger occupancy in Nepal. Journal of Zoology: 289; 10-18.

Duckworth J. W., Batters G., Belant J. L., Bennett E. L., Brunner J., Burton J,, Challender D. W. S., Cowling V., Duplaix N., Harris J. D., Hedges S., Long B., Mahood S. P., McGowan P. J. K., McShea W. J., Oliver W. L. R., Perkin S., Rawson B. M., Shepherd C. R., Stuart S. N., Talukdar B. K., Dijk P. P. van, Vié J-C., Walston J. L., Whitten T., and Wirth R.. 2012. Why South-east Asia should be the world’s priority for averting imminent species extinctions, and a call to join a developing cross-institutional programme to tackle this urgent issue. S.A.P.I.EN.S 5.2, Online since 12 August 2012, URL:,

Brook S.M., Coeverden de Groot P. van, Scott C., Boag P., Long B., Ley R.E., Reischer G.H., Williams A.C., Mahoodv, Tran Minh Hien, Polet G., Cox N., and Bach Thanh Hai, 2012. Integrated and novel survey methods for rhinoceros populations confirm the extinction of Rhinoceros sondaicus annamiticus from Vietnam, Biological Conservation 155: 59-67.

Long B. 2012 Saola. In Priceless or Worthless? The World’s most threatened species. Eds Baillie J.E.M. and Butcher E.R. Zoological Society of London and IUCN Species Survival Commission.

Robichaud, W. and Long B. 2011. Saola. In: Handbook of the Mammals of the World. Vol. 2. Hoofed Mammals. Eds: Wilson D.E. and Mittermeier R.A. Lynx Editions, Barcelona.

Gray T.N.E., Phan, C., and Long, B. 2010. Modelling species distribution at multiple spatial scales: gibbon habitat preferences in a fragmented landscape Animal Conservation 1–9.

Morrison, J., Loucks, C., Long, B., and Wikramanayake, E. 2009. Landscape-scale spatial planning at WWF: a variety of approaches. Oryx 34: 499–507.

Loucks C., Mascia M.B., Maxwell A. Keavuth Huy, Kong Duong, Nareth Chea, Long, B. Cox, N. and Teak Seng. 2009. Wildlife decline in Cambodia, 1953–2005: exploring the legacy of armed conflict. Conservation Letters 2: 82–92.

Gratwicke B., Mills J., Dutton A., Gabriel G., Long B., Seidensticker J., Wright B., Wang You and Li Zhang. 2008. Attitudes Toward Consumption and Conservation of Tigers in China. PLoS ONE 3(7): e2544. doi:10.1371/journal.pone.0002544.

Long B. and Minh Hoang. 2007. Recent records of and notes on the conservation of small carnivores in Quang Nam province, Central Vietnam. Small Carnivore Conservation 36: 39-46.

Delahay R.J., Ward A. I., Walker, N. Long B. and Cheeseman C. L. 2007. The distribution of badger (Meles meles) latrines in a high density population: habitat selection and implications for the transmission of bovine tuberculosis to cattle. Journal of Zoology 272: 311-320.

Hardcastle J.E., Long B., Le Van Lanh, Rambaldi G. and Do Quoc Son. 2004. The use of participatory three-dimensional modelling in community-based planning in Quang Nam province, Vietnam. PLA Notes 49: 70-76.

Veron G., Heard Rosenthal S., Long B. & Roberton S. 2004. The molecular systematics and conservation of an endangered carnivore, the Owston’s palm civet Chrotogale owstoni (Thomas, 1912) (Carnivora, Vivveridae, Hemigalinae). Animal Conservation 7: 107-112.

Long, B. 2000. The hairy-nosed otter (Lutra sumatrana) in Cambodia. IUCN Otter Spec. Group Bull.17: 91.,Tuyttens, F.A.M., Delahay, R.J., MacDonald, D.W., Cheeseman, C.L., Long, B. and Donnelly, C.A. 2000. Spatial perturbation caused by a badger (Meles meles) culling operation: implications for the function of territoriality and the control of bovine tuberculosis (Mycobacterium bovis). Journal of Animal Ecology 69: 815-828.

Tuyttens F.A.M., Long B., Fawcett T., Skinner A., Brown J.A., Cheeseman C.L., Roddam A.W. & Macdonald D.W. 2000. Estimating population size of Eurasian badgers (Meles meles) by quantifying latrine use along line transects. Journal of Applied Ecology 69: 815-828.