Reunion

Birds found nowhere else include the Reunion Marsh Harrier (eBird), the Reunion Cuckooshrike (eBird), the Reunion Olive White-eye (SEOR), the Reunion Gray White-eye (iNaturalist), the Reunion Bulbul (SEOR), the Reunion Stonechat (SEOR), and as breeding species, the Mascarene Petrel (SEOR) and Barau's Petrel (eBird) (ARKive WM). The Reunion Paradise Flycatcher (SEOR) is sometimes considered a distinct species from the one occurring on Mauritius. Extinct birds include the Reunion Ibis (SEOR), the Reunion Swamphen (Wikipedia), and the Reunion Kestrel (Julian Hume WM). Extinct endemic genera include the Mascarene Parrot (Wikipedia) (GBIF) and the Reunion Starling (Wikipedia).

Endemic reptiles include the Reunion Ornate Day Gecko (Faune de la Réunion) (iNaturalist) and several recently extinct species: the Reunion Giant Tortoise Cylindraspis indica (Wikipedia) (GBIF), Sonia's Night Gecko Nactus soniae and Cecilia's Skink Leiolopisma ceciliae (both at ResearchGate), and the Reunion Slit-eared Skink Gongylomorphus borbonicus (Reptile Database) (GBIF).

The Reunion Little Mastiff Bat Mormopterus francoismoutoui (faune-reunion.fr) (iNaturalist) is an endemic mammal. The Reunion Yellow Bat Scotophilus borbonicus (IUCN) (GBIF) is known only from two individuals described in 1803 and it is unclear if they actually came from Reunion.

Marine fish unique to Reunion include the Reunion Angelfish Apolemichthys guezei (reefbuilders), the Reunion Broadbanded Moray Channomuraena bauchotae (IFREMER WM pdf), the Chinbar Blenny Mimoblennius lineathorax (fig. 56 at BioOne) (FishBase), the Bourbon Chromis Chromis durvillei (ResearchGate), the Yellow Coris Coris flava (ResearchGate), the Reunion Slopefish Symphysanodon pitondelafournaisei (ResearchGate), a scorpionfish Scorpaenopsis rubrimarginata (ResearchGate), the Reunion Bristlemouth Argyripnus hulleyi (ResearchGate), the Reclusive Sole Aseraggodes guttulatus (GBIF), the Bluelined Toby Canthigaster caeruleolineata (ResearchGate), the Volcano Greeneye Chlorophthalmus vulcanus (ResearchGate), and the Reunion Longspine Spurdog Squalus longispinis (Shark References).

Butterflies restricted to Reunion include Papilio phorbanta (iNaturalist), Euploea goudotii (INPN), Antanartia borbonica (INPN), Neptis dumetorum (iNaturalist), and Salamis augustina (Rhopalocères de La Réunion WM). Endemic moths include an owlet moth Mythimna borbonensis (Papillons de Poitou-Charentes), a sphinx moth Macroglossum milvus (Papillons de Poitou-Charentes), and a uraniid moth Epiplema dadanti (INPN).

Other endemic insects include a dragonfly Hemicordulia atrovirens (INPN), a damselfly Coenagriocnemis reuniense (INPN), a mayfly Nigrobaetis colonus (INPN), a rhinoceros beetle Oryctes borbonicus (fr.wikipedia), a stag beetle Amneidus godefroyi (INPN), a cave-dwelling ground beetle Neocolpodes poussereaui (INPN), the tiger beetles Diastrophella pauliani (INPN) and Megalomma fulgens (iNaturalist), a scarab beetle Marronus borbonicus (INPN), a rove beetle Leiochrotella lequettei (ResearchGate), a whirligig beetle Dineutus aereus and a predaceous diving beetle Hydroglyphus strigicollis (both at Insectarium Reunion WM), a weevil Cratopus francki (INPN), a hoverfly Allograpta borbonica (iNaturalist), a water strider Microvelia bourbonensis (Insectarium Reunion WM), a cicada Fractuosella breoni (INPN), a termite Neotermes reunionensis (INPN), the stick insects Apterograeffea reunionensis (INPN) and Rhaphiderus spiniger (iNaturalist), the grasshoppers Pyrgacris descampsi (INPN) and Gastrimargus immaculatus (GBIF), and the katydids Paradecolya inexspectata (iNaturalist) and Brachyphisis viettei (INPN). Glomeremus orchidophilus (iNaturalist) is the world's only cricket known to act as a pollinator (IISE WM).

Endemic arachnids include a harvestman Gagrella reunionis (iNaturalist) and several spiders: Lycosa vulcani (F. Duban), Cynapes lineatus (INPN), Buitinga ifrit (GBIF), Heliophanus variabilis (INPN), Prepotelus curtus (INPN), Cheiracanthium insulare (INPN), and Nephilengys borbonica (iNaturalist). Land snails known solely from Reunion include Omphalotropis rubens (INPN), Pilula cordemoyi (iNaturalist), Harmogenanina argentea (iNaturalist), Caldwellia imperfecta (ARKive WM), Madgeaconcha gerlachi (BOLD), Gonospira uvula (fr.wikipedia), Plegma caelatura (fr.wikipedia), Erepta setiliris (iNaturalist), and Hyalimax maillardi (iNaturalist). A terrestrial crab Karstarma vulcan (GBIF) inhabits lava tubes of an active volcano.

Endemic marine invertebrates include a crab Platypilumnus inermis (biodivreunion.free.fr WM), a king crab Paralomis stella (biodivreunion.free.fr WM), a reef lobster Enoplometopus pictus (biomar.free.fr WM), a sponge Ascandra mascarenica (GBIF), a soft coral Ofwegenum kloogi (ZooKeys), and several marine snails: Dizoniopsis gothica (Vie Oceane WM), Nassarius reunionensis (Eddie Hardy), Koilofera koilofera (Vie Océane WM), Vaceuchelus jayorum (Eddie Hardy), Epitonium hueti (AnimalBase WM), and Quasimitra raphaeli (Eddie Hardy).

Among over 200 vascular plants exclusive to Reunion are the orchids Habenaria citrata (Orchidées Péï WM), Cynorkis borbonica (iNaturalist), Disa borbonica (iNaturalist), Angraecum striatum (iNaturalist), and Aeranthes strangulata (Orchidées Péï WM). Other endemic plants include Aloe macra (Wikipedia), Agarista buxifolia (iNaturalist), Psiadia retusa (iNaturalist), Erica reunionensis (iNaturalist), Costularia cadeti (iNaturalist), Cynoglossum borbonicum (iNaturalist), Hubertia tomentosa (fr.wikipedia), Seriphium passerinoides (iNaturalist), Nastus borbonicus (iNaturalist), Badula borbonica (iNaturalist), Ischaemum spathulatum (iNaturalist), Blechnum marginatum (POWO), Nesogenes orerensis (Borbonica Atlas), Carex ramosa (iNaturalist), and Alsophila glaucifolia (iNaturalist).

Trees known only from Reunion include the Champagne Palm (PACSOA WM), the Red Latan Palm (ARKive WM), the White Barbel Palm (Palmpedia), Pleurostylia pachyphloea (iNaturalist), Monimia rotundifolia (iNaturalist), Sophora denudata (CIRAD), Acacia heterophylla (iNaturalist), Eugenia buxifolia (Forêt Sèche), Polyscias aemiliguineae (flickr), Chassalia corallioides (iNaturalist), Diospyros borbonica (Forêt Sèche), Sideroxylon borbonicum (iNaturalist), Indigofera (or Bremontiera) ammoxylon (Fleurs Fruits Feuilles de), Maillardia borbonica (CIRAD), Pandanus montanus (iNaturalist), and Dombeya ficulnea (iNaturalist). Endemic tree genera include Forgesia (iNaturalist) and Ruizia (flickr) (iNaturalist).

Other endemic vascular plant genera include Faujasia (iNaturalist), Eriotrix (iNaturalist), Trichosandra (Borbonica Atlas) (iNaturalist), Heterochaenia (INPN), and Berenice (iNaturalist) (Wikipedia).

Endemic fungi include Bovista halophila (p. 2 of ZOBODAT pdf) and Mycena conglobata (p. 3 of ZOBODAT pdf). Endemic lichens include Fellhanera borbonica (100 New Lichens WM) and Cladonia insignis (BGBM). Endemic non-vascular plants include the liverworts Cheilolejeunea ecarinata (GBIF) and Microlejeunea strasbergii (ResearchGate) and the mosses Philonotis perigonialis (GBIF) and Fissidens ah-pengae (iNaturalist) (p. 115 of bryophytes-de-france.org WM pdf).

Reunion is an overseas region of France, is included in the Mascarene Forests ecoregion (WWF WM), is part of the Madagascar and the Indian Ocean Islands biodiversity hotspot (Biodiversity Hotspots WM), and is included in the Southern Mascarene Islands coral reef hotspot (Columbia Univ. WM pdf). The Inventaire National du Patrimoine Naturel provides lists of endemic animals (INPN) and endemic plants (INPN).