| How many species of flowering plants are there? LN Joppa, DL Roberts, SL Pimm Proceedings of the Royal Society B: Biological Sciences 278 (1705), 554-559, 2011 | 246 | 2011 |
| Biodiversity hotspots house most undiscovered plant species LN Joppa, DL Roberts, N Myers, SL Pimm Proceedings of the National Academy of Sciences 108 (32), 13171-13176, 2011 | 199 | 2011 |
| Validation of biological collections as a source of phenological data for use in climate change studies: a case study with the orchid Ophrys sphegodes KM Robbirt, AJ Davy, MJ Hutchings, DL Roberts Journal of Ecology 99 (1), 235-241, 2011 | 176 | 2011 |
| When did the dodo become extinct? DL Roberts, AR Solow Nature 426 (6964), 245-245, 2003 | 165 | 2003 |
| Elevational gradients of species diversity, breeding system and floral traits of orchid species on Reunion Island H Jacquemyn, C Micheneau, DL Roberts, T Pailler Journal of biogeography 32 (10), 1751-1761, 2005 | 125 | 2005 |
| The population ecology and social behavior of taxonomists LN Joppa, DL Roberts, SL Pimm Trends in Ecology and Evolution 26 (11), 551-553, 2011 | 111 | 2011 |
| How many herbarium specimens are needed to detect threatened species? MC Rivers, L Taylor, NA Brummitt, TR Meagher, DL Roberts, ... Biological Conservation 144 (10), 2541-2547, 2011 | 106 | 2011 |
| Orchids DL Roberts, KW Dixon Current Biology 18 (8), R325-R329, 2008 | 89 | 2008 |
| A review of the trade in orchids and its implications for conservation A Hinsley, HJ De Boer, MF Fay, SW Gale, LM Gardiner, RS Gunasekara, ... Botanical Journal of the Linnean Society 186 (4), 435-455, 2018 | 88 | 2018 |
| Potential disruption of pollination in a sexually deceptive orchid by climatic change KM Robbirt, DL Roberts, MJ Hutchings, AJ Davy Current Biology 24 (23), 2845-2849, 2014 | 82 | 2014 |
| Dynamics of the global trade in live reptiles: Shifting trends in production and consequences for sustainability JE Robinson, RA Griffiths, FAV St John, DL Roberts Biological Conservation 184, 42-50, 2015 | 80 | 2015 |
| A nonparametric test for extinction based on a sighting record AR Solow, DL Roberts Ecology 84 (5), 1329-1332, 2003 | 79 | 2003 |
| Pollination biology: the role of sexual reproduction in orchid conservation DL Roberts Natural History Publications, 2003 | 79 | 2003 |
| How many endangered species remain to be discovered in Brazil SL Pimm, CN Jenkins, LN Joppa, DL Roberts, GJ Russell Natureza & Conservação 8 (1), 71-77, 2010 | 77 | 2010 |
| Species identification by experts and non-experts: comparing images from field guides GE Austen, M Bindemann, RA Griffiths, DL Roberts Scientific Reports 6 (1), 1-7, 2016 | 74 | 2016 |
| Significance of sighting rate in inferring extinction and threat GJ McINERNY, DL Roberts, AJ Davy, PJ Cribb Conservation biology 20 (2), 562-567, 2006 | 71 | 2006 |
| Identifying anomalous reports of putatively extinct species and why it matters DL Roberts, CS Elphick, JM Reed Conservation Biology 24 (1), 189-196, 2010 | 61 | 2010 |
| Comparative micromorphology of nectariferous and nectarless labellar spurs in selected clades of subtribe Orchidinae (Orchidaceae) AK Bell, DL Roberts, JA Hawkins, PJ Rudall, MS Box, RM Bateman Botanical Journal of the Linnean Society 160 (4), 369-387, 2009 | 61 | 2009 |
| Comparing IUCN and probabilistic assessments of threat: do IUCN red list criteria conflate rarity and threat? KM Robbirt, DL Roberts, JA Hawkins Biodiversity & Conservation 15 (6), 1903-1912, 2006 | 57 | 2006 |
| On the Pleistocene extinctions of Alaskan mammoths and horses AR Solow, DL Roberts, KM Robbirt Proceedings of the National Academy of Sciences 103 (19), 7351-7353, 2006 | 56 | 2006 |
