Balmford, A. (2017) On positive shifting baselines and the importance of optimism. Oryx, 51, 191–192.
Collar, N.J. (1998) Extinction by assumption: or, the Romeo Error on Cebu. Oryx, 32, 239–244.
Edwards, C.E., Bassüner, B., Birkinshaw, C., Camara, C., Lehavana, A., Lowry, P.P., et al. (2018) A botanical mystery solved by phylogenetic analysis of botanical garden collections: the rediscovery of the presumed-extinct Dracaena umbraculifera. Oryx, 52, 427–436.
Fisher, M. (2019) The small, the hidden, the less-loved: conserving other species. Oryx, 53, 199–200.
IUCN (2012) IUCN Red List Categories and Criteria: Version 3.1. 2nd edition. Gland, Switzerland, and Cambridge, UK. portals.iucn.org/library/node/10315 [accessed 20 December 2019]. IUCN Standards and Petitions Committee (2019) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee. iucnredlist.org/documents/RedListGuidelines.pdf [accessed 20 December 2019].
Knowlton, N. (2019) Earth Optimism—recapturing the positive. Oryx, 53, 1–2.
Lee, T., Meyer, J.-Y., Burch, J.B., Pearce-Kelly, P. & Ó Foighil, D. (2008) Not completely lost: two partulid tree snail species persist on the highest peak of Raiatea, French Polynesia. Oryx, 42, 615–619.
Mandimbihasina, A.R., Woolaver, L.G., Concannon, L.E., Milner-Gulland, E.J., Lewis, R.E., Terry, A.M.R. et al. (2020) The illegal pet trade is driving Madagascar's ploughshare tortoise to extinction. Oryx, 54, 188–196.
Roberts, D.L. & Jarić., I. (2020) Inferring the extinction of species known only from a single specimen. Oryx, 54, 161–166.
Rózsa, L. & Vas, Z. (2015) Co-extinct and critically co-endangered species of parasitic lice, and conservation-induced extinction: should lice be reintroduced to their hosts? Oryx, 49, 107–110.
Shwe, N.M., Sukumal, N., Grindley, M. & Savini, T. (2020) Is Gurney's pitta Hydrornis gurneyi on the brink of extinction? Oryx, 54, 16–22.
Silcock, J.L., Field, A.R., Walsh, N.G. & Fensham, R.J. (2020) To name those lost: assessing extinction likelihood in the Australian vascular flora. Oryx, 54, 167–177.
Sulis, E., Bacchetta, G., Cogoni, D., Gargano, D. & Fenu, G. (2020) Assessing the global conservation status of the rock rose Helianthemum caput-felis. Oryx, 54, 197–205.
Tilker, A., Nguyen, A., Abrams, J.F., Bhagwat, T., Le, M., Nguyen, T.V. et al. (2020a) A little-known endemic caught in the South-east Asian extinction crisis: the Annamite striped rabbit Nesolagus timminsi. Oryx, 54, 178–187.
Tilker, A., Nguyen, A., Timmins, R.J., Gray, T.N.E., Steinmetz, R., Abramov, A.V. & Wilkinson, N. (2020b) No longer Data Deficient: recategorizing the Annamite striped rabbit Nesolagus timminsi as Endangered. Oryx, 54, 151.
Valdés González, A., Martínez Estévez, L., Ángeles Villeda, M.E. & Ceballos, G. (2020) The extinction of the Catarina pupfish Megupsilon aporus and the implications for the conservation of freshwater fish in Mexico. Oryx, 54, 154–160.