# Hypothetical species

Several species have been assumed to exist, but due to a lack of physical evidence they can only be regarded as potential species. Hypothetical species are usually believed to be extinct. They have caused confusion, as they may have been a separate species, a subspecies, an introduced species or a misidentification.

## List of hypothetical species
### Birds

* Albin's Macaw
* Arkansaw siskin, Fringilla spaltria
* Barraband's mystery black-breasted twelve-wired bird-of-paradise
* Bird of Washington, Haliaetus washingtoni
* Blue-browed fig parrot
* Blue Mountain warbler, Sylvia montana
* Blue-thighed lory, Lorius tibialis
* Carbonated warbler, Sylvia carbonata
* Cuvier's kinglet, Regulus cuvieri
* Dominican green-and-yellow macaw, Ara atwoodi
* Geoffroyus aureus
* George Edwards parrot
* Giant waterhen
* Guadeloupe amazon, Amazona violacea
* Guadeloupe parakeet, Psittacara labati
* Hypothetical relatives of the Rodrigues parrot
* Jago fowl, Gallus giganteus
* Jamaican red macaw, Ara gossei
* Kondlo
* Lesser Antillean macaw, Ara guadeloupensis
* Madeira finch, Goniaphea leucocephala
* Martinique amazon, Amazona martinicana
* Martinique macaw, Ara martinicus
* Painted vulture, Sarcoramphus sacra
* Raiatea starling, Aplonis? ulietensis
* Red-headed macaw, Ara erythrocephala
* Réunion stork, Leguatia gigantea
* Réunion swamphen, Porphyrio caerulescens
* Ruruwekau
* Small-headed flycatcher, Muscicapa minuta
* Sushkin's goose, Anser neglectus
* Tahiti crake, Zapornia nigra
* Townsends' dickcissel, Spiza townsendi
* Townsend’s finch, Emberiza townsendi
* Unicolored lory, Eos unicolor
* Unidentified geese
* Zhenniao

### Non-avian dinosaurs

* Proavis

### Reptiles

* Afa
* New Caledonian monitor
* Rio Paru giant tortoise

### Mammals

* Agulhas dolphin
* Alula whale, Orcinus mörzer-bruynsus
* Andean wolf, Dasycyon hagenbecki
* Antarctic long-finned whale
* Arabian dolphin, Stenella longirostris sp
* Arboreal giant anteater, Myrmecophaga sp nov
* Australian common dolphin
* Bangweulu antelope
* Bergman's bear, Ursus arctos piscator
* Bengal dolphin, Stenella alope
* Bili Ape
* Borneo white dolphin, Sousa borneensis
* Chilihueque, Lama araucana
* Chinese elephant, Elephas maximus rubridens
* Delphinus albigenia
* Elephant-dung bat
* Euphrosyne dolphin\Grey’s long-snouted porpoise, Stenella euphrosyne
* Flores Sea dolphin
* Galapagos dolphin
* Giglioli's whale, Amphiptera pacifica
* Giraffa sahara
* Gosse's white-flippered whale
* Greek dolphin
* Gulfstream spotted dolphin, Stenella plagiodon
* High-finned sperm whale, Physeter tursio
* Illigan dolphin
* Irish spotted otter
* Javan Sea dolphin
* Kallana
* Kting voar, Pseudonovibos spiralis
* Lamut wild horse
* Lesson’s little dolphin, Delphinus minimus
* Long-necked seal, Phoca mutica
* Malacca dolphin
* Malay dolphin, Stenella malayana
* Marozi
* Mongitore's whale, Oxypterus mongitori
* Philippine dolphin
* Rhinoceros dolphin, Cetodipterus rhinoceros
* Rothschild-neuville tusk, Colossochoerus sp
* Senegal dolphin
* Shrewdinger
* Sonnerat's shrew, Diplomesodon sonnerati
* South China Sea dolphin
* Speckled dolphin, Sousa lentiginosa
* Steller's sea ape, Simia marina
* Sumxu
* Tailed slow loris, Nycticebus caudatus
* Tuoa
* Unidentified beaked whales
* Unidentified extinct canid populations

### Amphibians

* Flannery's frog

### Fish

* Abyssal rainbow gar
* Carangoides ciliarius
* Five-lined constellation fish, Bathysidus pentagrammus
* Giant cookiecutter shark, Isistius sp
* Giant dragonfish, Bathysphaera intacta
* Gulf Coelacanth
* Pallid sailfin, Bathyembryx istiophasma
* Three-starred anglerfish, Bathyceratias trilynchnus
* Trieste fish

### Arthropods

* Acarus crossi
* Battus polydamas antiquus
* Guam glider, Neptis guamensis
* Roger's monarch, Euploea rogeri
* Uhini pa'awhela

### Other Invertebrates

* Thermozodium esakii
* Porpita prunella
* Salinella salve

### Plants

* Laysan fan palm, Pritchardia? sp
* Silphium