Reptiles unique to Hong Kong include Bogadek’s Burrowing Lizard Dibamus bogadeki (Reptiles of Hong Kong), the Hong Kong Blind Snake Typhlops lazelli (Harvard pdf file), and Hollinrake's Bronzeback Dendrelaphis hollinrakei (eol).
Romer’s Tree Frog Liuixalus romeri (ARKive) is an endemic amphibian.
A fish found nowhere else is the freshwater sleeper Sineleotris saccharae
Dragonflies known solely from Hong Kong include the Hong Kong Tusktail Fukienogomphus choifongae and a clubtail Leptogomphus hongkongensis (both at AFCD HK). Endemic owlet moths include Pangrapta roseinotata (flickr), Athetis bispurca (flickr), Ugia purpurea (flickr), and Belciana scorpio (flickr). Endemic looper moths include Sigilliclystis kendricki (Andrew Hardacre), Eupithecia sekkongensis (HKU), and Pingasa chloroides (Critters Page). Other endemic insects include the Mai Po Bent-winged Firefly Pteroptyx maipo (p. 2 of HKES pdf file), a ladybird beetle Horniolus hisamatsui (hkwildlife.net), a ground beetle Dasiosoma hirsutum (Species ID), a tiger beetle Protocollyris ngaungakshani (HKES pdf file), an ant Paratopula bauhinia (Science Daily), and the stick insects Entoria victoria (flickr) and Neohirasea hongkongensis (flickr).
endemic invertebrates include a jumping spider Icius
a freshwater shrimp Caridina
Museum pdf file), a sea slug Gascoignella aprica
Slug Forum), and the freshwater crabs Nanhaipotamon hongkongense
Among about 20 species of vascular plants restricted to Hong Kong are Guile's Boeica (HK Herbarium), the Hong Kong Balsam (HK Herbarium), the Shiuying Bamboo (HK Flora), the Woon-young Bamboo (HK Herbarium), Thismia hongkongensis (PhytoKeys), the Lantau Star-anise (HK Herbarium), the Hong Kong Asarum (HK Herbarium), the Hong Kong Croton (HK Herbarium), a beautyberry Callicarpa longibracteata (HK Herbarium), Justicia championii (HK Herbarium), Aster striatus (hkwildlife.net), the Subglabrous Cane (HK Herbarium), the Entire Lip Ginger (HK Herbarium), Syzygium impressum (Life Discovery), Begonia hongkongensis (HK Herbarium), Balanophora hongkongensis (news.gov.hk), Beilschmiedia glandulosa (hkwildlife.net), and four orchids: the Two-coloured Bulbophyllum (HK Wild Orchids), Tsea's Bulbophyllum (IOPSE), Monteiro's Caterpillar Orchid (HK Herbarium), and the Hong Kong Habenaria (IOPSE).
Hong Kong is a special administrative region of China, is part of the South China-Vietnam Subtropical Evergreen Forests ecoregion (EoE), and is part of the Indo-Burma Biodiversity Hotspot (CEPF). For a list of species first described from Hong Kong with many endemic species indicated see (Wikipedia).