Bermuda

The endangered Bermuda Petrel or Cahow (ARKive) was once thought extinct and breeds only in Bermuda. The Bermuda White-eyed Vireo Vireo griseus bermudianus (Bermuda Conservation) is an endemic subspecies. 

The Bermuda Skink (ARKive) is the sole reptile unique to the island.

Two species of freshwater fish are restricted to Bermuda: the Bermuda Killifish Fundulus bermudae (Bermuda Conservation) and the Lover's Lake Killifish Fundulus relictus (Bermuda Conservation). Marine fish known only from Bermuda include the Bermuda Anchovy Anchoa choerostoma (p. 13 of FAO pdf file), Bermuda Halfbeak Hemiramphus bermudensis (ingentaconnect pdf file), another halfbeak Hyporhamphus collettei (BioOne), the Bermuda Tilefish Caulolatilus bermudensis (eol), the Bank Bass Parasphyraenops atrimanus (Smithsonian pdf file), and the Bermuda Bream Diplodus bermudensis (Bermuda BREAM).

Bermuda has over 60 endemic cave invertebrates (CaveBiology.com) including a shrimp Procaris chacei (CaveBiology.com), an isopod Arubolana aruboides (ARKive), an amphipod Pseudoniphargus grandimanus (ARKive), an endemic genus of opossum shrimp Bermudamysis speluncola (ARKive) and an endemic family of crustacean, the Mictocarididae (CaveBiology.com). Above ground invertebrates found exclusively on Bermuda include the extinct Bermuda Flightless Grasshopper Paroxya bermudensis (OSF), the possibly extinct Bermuda Cicada Tibicen bermudiana (Bermuda Conservation), a jumping spider Habronattus nesiotus (Salticidae of the World), a freshwater limpet Ancylus bermudensis (Bermuda Conservation), a freshwater clam Pisidium volutabundum (Google Books), and an endemic genus of land snail Poecilozonites (Bermuda Conservation).

Several families of marine creatures are known only from Bermuda including a jaw worm Problognathia minima (UvA) and an echinoderm Calymne relicta (NHM-London). Among the marine molluscs unique to Bermuda are the spindle shells Fusinus lightbourni (Internet Archive) and Bullockus guesti (Eddie Hardy), a sea slug Hypselodoris zebra (Sea Slug Forum), a murex Pterynotus lightbourni (eol), Turbonilla leuca (fig. 18 at Google Books), and a cone shell Conus lightbourni (Eddie Hardy).  A hermit crab Calcinus verrilli (Rodrigues Lab) is also endemic.

There are about a dozen species of vascular plants restricted to Bermuda. The most seriously threatened is the Governor Laffan's Fern Diplazium laffanianum (Bermuda Conservation) which is extinct in the wild, but survives in the Bermuda Botanical Gardens. Other endemic plants include the Bermuda Cedar Juniperus bermudiana (Wikipedia), the Bermuda Palm Sabal bermudana (ARKive), the Bermuda Sedge Carex bermudiana (Bermuda Conservation), the Bermuda Pepper Peperomia septentrionalis (Bermuda Conservation), the Bermuda Spike Rush Eleocharis bermudiana (NYBG), the Bermuda Olivewood Cassine laneana (Bermuda Conservation), the Bermudiana Sisyrinchium bermudiana (flickr), the Bermuda Bean Phaseolus lignosus (Bermuda Conservation), Darrell's Fleabane Erigeron darrellianus (Bermuda Conservation), the Bermuda Shield Fern Goniopteris bermudiana (nefern), and the Bermuda Maidenhair Fern Adiantum bellum (nefern).

Bermuda is an overseas territory of the United Kingdom and comprises the Bermuda Subtropical Conifer Forests ecoregion (EoE). An overview of Bermuda's animals and plants can be found in the Bermuda Biodiversity Country Study (biodiversityactionplan.bm pdf file) and in the account by the JNCC (JNCC pdf file).