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- Rabbit fishSpecies of cartilaginous fish
- RabbitfishGenus of fishes
- Rabbits in AustraliaEuropean rabbits (Oryctolagus cuniculus) were first introduced to Australia in the 18th ce
- Rabies in animalsDeadly zoonotic disease
- Rabies virusSpecies of virus
- RaccoonMedium-sized mammal native to North America
- Race (taxonomy)Informal rank in the taxonomic hierarchy, below the level of subspecies
- RadiataHistorical taxonomic rank
- RadiodontaExtinct order of basal arthropods
- Radjah shelduckThe radjah shelduck (Radjah radjah), is a species of shelduck found mostly in New Guinea a
- RadulaAnatomical structure of mollusks used for eating
- Ragamuffin catBreed of cat
- RagdollBreed of cat
- Rail-babblerGenus of birds
- Rainbow lorikeetSpecies of bird
- Rainbow troutFresh-water species of fish
- Rainbow-bearded thornbillThe rainbow-bearded thornbill (Chalcostigma herrani) is a species of hummingbird in the "c
- RamakkalmeduRamakkalmedu is a hill station and a hamlet in Idukki district in the Indian state of Kera
- Ramaria araiosporaRamaria araiospora, commonly known as the red coral, is a coral mushroom in the family Gom
- Ramisyllis multicaudataSpecies of annelid worm
- RamphastosGenus of birds
- RamsayiaRamsayia is an extinct genus of giant wombat, weighing around 100 kg. Ramsayia is known fr
- Rana (genus)Genus of amphibians
- RanatraGenus of true bugs
- Ranganathittu Bird SanctuaryRanganathittu Bird Sanctuary (also known as Pakshi Kashi of Karnataka), is a bird sanctuar
- RangeomorphTaxon of frondose Ediacaran fossils
- Ranina raninaSpecies of crab
- Rare breedBreed of poultry or livestock that has a very small breeding population
- Rat-tailed maggotLarvae of hoverflies in the tribes Eristalini and Sericomyiini
- RatitePolyphyletic group of birds
- RattiniRattini is a very large, diverse tribe of muroid rodents in the subfamily Murinae. They ar
- RattusGenus of rodents
- RauisuchidaeRauisuchidae is a group of large (up to 6 metres (20 ft)) predatory Triassic archosaurs. S
- RavenIndex of animals with the same common name
- RazanandrongobeRazanandrongobe (meaning "ancestor [of the] large lizard" in Malagasy) is a genus of carni
- Razor-billed curassowThe razor-billed curassow (Mitu tuberosum) is a species of bird in the family Cracidae, th
- Rebecca (raccoon)Presidential pet raccoon
- Recurve-billed bushbirdThe recurve-billed bushbird (Clytoctantes alixii) is an Endangered species of Thamnophilid
- RecurvirostridaeFamily of birds
- Red Deer Cave peoplePrehistoric humans from 12,500 BCE in southwest China
- Red forest duikerThe red forest duiker, Natal duiker, or Natal red duiker (Cephalophus natalensis) is a sma
- Red foxSpecies of mammal
- Red hartebeestThe red hartebeest (Alcelaphus buselaphus caama), also called the Cape hartebeest or Caama
- Red harvester antSpecies of ant
- Red imported fire antInvasive ant species
- Red imported fire ants in the United StatesThe red imported fire ant (Solenopsis invicta), or simply RIFA, is one of over 280 species
- Red junglefowlSpecies of bird; ancestor of the chicken
- Red kangarooSpecies of mammal
- Red king crabSpecies of king crab
- Red loryThe red lory (Eos bornea) is a species of parrot in the family Psittaculidae. It is the se
- Red mulletCommon name for several species of fish
- Red pandaSpecies of mammal in Asia
- Red river hogSpecies of pig
- Red squirrelSpecies of tree squirrel common in Europe and Asia
- Red wolfCanid native to the southeastern United States
- Red-backed mousebirdThe red-backed mousebird (Colius castanotus) is a species of bird in the Coliidae family.
- Red-bellied black snakeVenomous snake native to eastern Australia
- Red-billed curassowThe red-billed curassow or red-knobbed curassow (Crax blumenbachii) is an endangered speci
- Red-billed firefinchThe red-billed firefinch or Senegal firefinch (Lagonosticta senegala) is a small seed-eati
- Red-billed queleaSmall, migratory weaver bird native to Africa
- Red-breasted meadowlarkThe red-breasted meadowlark (Leistes militaris) is a passerine bird in the New World famil
- Red-breasted merganserThe red-breasted merganser (Mergus serrator) is a duck species that is native to much of t
- Red-browed finchThe red-browed finch (Neochmia temporalis) is an estrildid finch that inhabits the east co
- Red-browed pardaloteThe red-browed pardalote (Pardalotus rubricatus) is a small brightly coloured insectivorou
- Red-crowned ant tanagerSpecies of bird
- Red-crowned woodpeckerThe red-crowned woodpecker (Melanerpes rubricapillus) is a species of bird in the subfamil
- Red-fan parrotThe red-fan parrot (Deroptyus accipitrinus), also known as the hawk-headed parrot, is a Ne
- Red-flanked duikerSpecies of mammal
- Red-gartered cootThe red-gartered coot (Fulica armillata) is a species of bird in subfamily Rallinae of fam
- Red-handed howlerThe red-handed howler (Alouatta belzebul) is a vulnerable species of howler monkey, a type
- Red-headed barbetThe red-headed barbet (Eubucco bourcierii) is a species of bird in the family Capitonidae,
- Red-kneed dotterelThe red-kneed dotterel (Erythrogonys cinctus) is a species of plover in a monotypic genus
- Red-knobbed cootThe red-knobbed coot or crested coot, (Fulica cristata), is a member of the rail and crake
- Red-legged kittiwakeThe red-legged kittiwake (Rissa brevirostris) is a seabird species in the gull family Lari
- Red-legged tinamouThe red-legged tinamou or red-footed tinamou, (Crypturellus erythropus) is a ground-dwelli
- Red-necked pademelonThe red-necked pademelon (Thylogale thetis) is a forest-dwelling marsupial living in the e
- Red-necked wallabyThe red-necked wallaby or Bennett's wallaby (Notamacropus rufogriseus) is a medium-sized m
- Red-rumped caciqueThe red-rumped cacique (Cacicus haemorrhous) is a species of bird in the family Icteridae.
- Red-tailed hawkSpecies of bird
- Red-tailed laughingthrushThe red-tailed laughingthrush (Trochalopteron milnei) is a species of bird in the laughing
- Redback spiderSpecies of spider
- Redcliff PointRedcliff Point is on the south coast of England, to the east of Weymouth in Dorset. It lie
- Redfin pickerelThe redfin pickerel (Esox americanus americanus) is a subspecies of freshwater fish belong
- ReduviidaeFamily of insects
- ReedbuckGenus of mammals
- ReedfishSpecies of fish
- Reef lobsterGenus of crustaceans
- RegnosaurusRegnosaurus (meaning "Sussex lizard") is a genus of herbivorous stegosaurian dinosaur that
- ReithrodontomysReithrodontomys is the genus of groove-toothed New World harvest mice.
- RemingtonocetidaeFamily of mammals
- RemingtonocetusRemingtonocetus is an extinct genus of early cetacean freshwater aquatic mammals of the fa
- René JeannelRené Jeannel (23 March 1879 – 20 February 1965) was a French entomologist. He was director
- RepenomamusExtinct genus of mammals
- Reproduction and life cycle of the golden eagleGolden eagles usually mate for life. A breeding pair is formed in a courtship display. Thi
- ReptantiaReptantia is a clade of decapod crustaceans named in 1880 which includes lobsters, crabs a
- ReptiliomorphaClade of reptile-like animals
- Requiem sharkRequiem sharks are members in the family Carcharhinidae. They are migratory, live-bearing
- Respiratory system of insectsAn insect's respiratory system is the system with which it introduces respiratory gases to
- Reticulated giraffeSpecies of giraffe
- Reticulated pythonSpecies of snake
- ReticulitermesReticulitermes is a termite genus in the family Rhinotermitidae. They are found in most te
- Reticulitermes flavipesSpecies of insect found in North America
- RetrieverDog type
- Rex rabbitFamily of rabbit breeds
- RhabditophoraClass of flatworms
- RhabdopleuraGenus of hemichordate graptolite
- Rhabdopleura normaniRhabdopleura normani is a small, marine species of worm-shaped animal known as a pterobran
- RhabdopleuridaOrder of hemichordates in the pterobranchian class
- RhagoveliaRhagovelia is a genus of smaller water striders in the family Veliidae. There are at least
- RhamphorhynchusGenus of rhamphorhynchid pterosaur from the Late Jurassic
- RhaphidophoridaeFamily of insects
- RhaphiinaeRhaphiinae is a subfamily of flies in the family Dolichopodidae.
- RhinconichthysRhinconichthys is an extinct genus of bony fish which existed during the Cenomanian stage
- Rhinoceros (genus)Genus of mammals
- RhinocerotoideaSuperfamily of mammals
- RhinodermaRhinoderma, commonly known as Darwin's frogs, is a genus of small frogs found in Chile and
- RhinodermatidaeRhinodermatidae, also known as Darwin's frogs, mouth-breeding frogs or mouth-brooding frog
- Rhinogobius flumineusRhinogobius flumineus, commonly known as the lizard goby or kawa-yoshinobori, is a species
- RhinogradentiaFictitious order of mammals
- RhinoptilusRhinoptilus is a genus of coursers, a group of wading birds. There are three species, whic
- RhizophascolonusRhizophascolonus is an extinct genus of wombat known from the Early Miocene of South Austr
- RhizostomeaeOrder of jellyfish with eight branched oral arms
- RhizotheraRhizothera is a bird genus in the family Phasianidae, native to Malaysia and Indonesia. Th
- RhodaliidaeRhodaliidae is a family of siphonophores. In Japanese they are called ヒノマルクラゲ (hinomarukur
- Rhode Island RedAmerican breed of domestic chicken
- RhoetosaurusRhoetosaurus (meaning "Rhoetos lizard"), named after Rhoetus, a titan in Greek mythology,
- Rhopalosiphum rufiabdominaleSpecies of aphid
- RhopalosomatidaeRhopalosomatidae is a family of Hymenoptera containing about 68 extant species in four gen
- RhynchobatusRhynchobatus is a group of rays commonly known as wedgefishes in the family Rhinidae. They
- RhynchocephaliaOrder of reptiles
- RhynchocinetesRhynchocinetes is a genus of shrimp, containing the following 14 species:
- RhynchocinetidaeFamily of crustaceans
- RhynchocyonGenus of mammals
- RhynchonellaExtinct genus of brachiopod
- RhynchonkosRhynchonkos is an extinct genus of rhynchonkid microsaur. Originally known as Goniorhynchu
- RhynchosauriaExtinct order of reptiles
- RhyparochromidaeThe Rhyparochromidae are a large family of true bugs (order Hemiptera). Many species under
- Ribbon eelSpecies of fish
- Ribbon sealSpecies of mammal
- RibbonfishFamily of fishes
- Rice weevilSpecies of beetle
- RicefishFamily of fishes
- Richard HingstonBritish physician, explorer, and naturalist
- Richard PrumRichard O. Prum (born 1961) is an evolutionary biologist and ornithologist. He is the Will
- RicinuleiOrder of arachnids
- RiftiaGiant tube worm (species of annelid)
- Right whaleThree species of large baleen whales of the genus Eubalaena
- Right whale dolphinGenus of mammals
- Rijksmuseum van Natuurlijke HistorieThe Rijksmuseum van Natuurlijke Historie (National Museum of Natural History) was a museum
- Rin Tin TinGerman Shepherd actor (1918–1932)
- Ring-tailed lemurSpecies of mammal from Madagascar
- Ring-tailed lemur vocalizationsThe ring-tailed lemur has a complex array of distinct vocalizations used to maintain group
- Ringed sealSpecies of carnivore
- RingtailSpecies of mammal
- Risso's dolphinSpecies of marine mammal
- River dolphinPolyphyletic grouping of dolphins
- River kingfisherSubfamily of birds
- River martinThe river martins form a distinctive subfamily Pseudochelidoninae within the swallow and m
- River sharkGenus of sharks
- Riverside wrenThe riverside wren (Cantorchilus semibadius) is a species of bird in the family Troglodyti
- Riversleigh World Heritage AreaUNESCO World Heritage Site in Queensland, Australia
- Riversleigh, QueenslandRiversleigh is a rural locality in the Shire of Murweh, Queensland, Australia. In the 2021
- RoachoidExtinct paraphyletic group of insects
- RoadianIn the geologic timescale, the Roadian is an age or stage of the Permian. It is the earlie
- RoadrunnerGenus of birds
- Roan (color)Coat color found in many animals
- RoarDeep resonating sound produced by animals
- Robin Russell, 14th Duke of Bedford(Henry) Robin Ian Russell, 14th Duke of Bedford DL (21 January 1940 – 13 June 2003) was a
- Rochester BestiaryThe Rochester Bestiary (London, British Library, Royal MS 12 F.xiii) is a richly illuminat
- Rock crawlingRock crawling is an extreme form of off-road driving using specialized vehicles ranging fr
- Rock hyraxSpecies of mammal native to Africa and the Middle East
- Rock-wallabyGenus of marsupials
- Rocky Mountain locustExtinct species of grasshopper
- Rodolphe Meyer de SchauenseeRodolphe Meyer de Schauensee (; January 4, 1901 – April 24, 1984) was a Swiss-American orn
- Rodrigues flying foxLarge species of bat native to the island of Rodrigues
- Roe deerSpecies of deer
- RollulinaeRollulinae is a bird subfamily containing the jungle and wood partridges. They are the mos
- Romney sheepSheep breed
- Rondônia bushbirdThe Rondonia bushbird (Clytoctantes atrogularis) is a Near Threatened species of bird in s
- Rook (bird)Species of bird in the crow family Corvidae
- RorqualFamily of cetacean mammals
- Rose Marie Antoinette Blommers-SchlösserDutch herpetologist and entomologist
- Rose-ringed parakeetSpecies of bird
- RosellaGenus of birds
- Rosette (design)A rosette is a round, stylized flower design.
- Rostrum (anatomy)Anatomy term
- Rothschild's rock-wallabyRothschild's rock-wallaby (Petrogale rothschildi) – sometimes known as the Roebourne rock-
- RotiferPhylum of pseudocoelomate invertebrates
- Rough-skinned newtSpecies of amphibian known for strong toxicity
- Rove beetleFamily of beetles
- Royal jellySecretion from the glands of nurse bees
- Royal Ontario MuseumMuseum in Toronto, Ontario, Canada
- Royal ShowThe Royal Show, also known as the Royal Agricultural Show, was an annual agricultural show
- RSPCAAnimal welfare charity in England and Wales
- RSPCA AssuredFarmed animal welfare food assurance scheme
- Rubeho MountainsThe Rubeho Mountains are a mountain range in central Tanzania. The mountains in Dodoma and
- RubidgeaExtinct genus of therapsids
- RubidgeinaeRubidgeinae is an extinct subfamily of gorgonopsid therapsids known only from Africa. They
- RucervusRucervus is a genus of deer from India, Nepal, Indochina, and the Chinese island of Hainan
- RudistsExtinct order of bivalve molluscs
- RuehleiaRuehleia is a genus of sauropodomorph dinosaur from the Late Triassic period of Germany. T
- Ruff (bird)Species of bird
- Ruffed lemurGenus of primates from Madagascar
- RufousRufous#A81C07
- Rufous bristlebirdThe rufous bristlebird (Dasyornis broadbenti) is one of three extant species of bristlebir
- Rufous crab hawkThe rufous crab hawk (Buteogallus aequinoctialis) or rufous crab-hawk, is a Near Threatene
- Rufous hummingbirdSpecies of bird
- Rufous piculetThe rufous piculet (Sasia abnormis) is a species of bird in the family Picidae. It is foun
- Rufous songlarkThe rufous songlark (Cincloramphus mathewsi) is a species in the family Locustellidae ende
- Rufous whistlerThe rufous whistler (Pachycephala rufiventris) is a species of whistler found in New Caled
- Rufous-bellied seedsnipeThe rufous-bellied seedsnipe (Attagis gayi) is a bird in suborder Scolopaci of order Chara
- Rufous-capped babblerThe rufous-capped babbler (Cyanoderma ruficeps) is a babbler species in the family Timalii
- Rufous-capped nunletThe rufous-capped nunlet (Nonnula ruficapilla) is a species of near-passerine bird in the
- Rufous-collared kingfisherThe rufous-collared kingfisher (Actenoides concretus) is a species of bird in the family A
- Rufous-naped bellbirdThe rufous-naped bellbird (Aleadryas rufinucha), or rufous-naped whistler, is a species of
- Rufous-necked hornbillSpecies of bird
- Rufous-shafted woodstarThe rufous-shafted woodstar (Chaetocercus jourdanii) is a species of hummingbird in tribe
- Rufous-sided crakeThe rufous-sided crake (Laterallus melanophaius) is a species of bird in subfamily Rallina
- Rufous-tailed hummingbirdThe rufous-tailed hummingbird (Amazilia tzacatl) is a medium-sized hummingbird in the "eme
- Rufous-tailed robinThe rufous-tailed robin (Larvivora sibilans) is a small passerine bird. Its breeding range
- Rufous-throated sapphireThe rufous-throated sapphire (Hylocharis sapphirina) is a species of hummingbird in the "e
- Rufous-vented chachalacaThe rufous-vented chachalaca (Ortalis ruficauda) is a member of an ancient group of birds
- Rump (animal)Part of an animal that is behind the loins and below the tail
- RuntAnimal unusually small for its species
- RupelianFirst Age of the Oligocene Epoch
- Rüppell's foxSpecies of carnivore
- Rüppell's vultureRüppell's vulture (Gyps rueppelli), also called Rüppell's griffon vulture, named after Edu
- RusingoryxRusingoryx is a genus of extinct alcelaphine bovid artiodactyl closely related to the wild
- RuspoliaRuspolia is a genus of bush crickets in the subfamily Conocephalinae. This genus includes
- RussellosaurusRussellosaurus is an extinct genus of tethysaurine mosasauroid from the Late Cretaceous of
- Russian BlueBreed of cat
- Russian blue potatoThe Russian blue potato is a deep purple cultivar of potato believed to have originated in
- Rusty blackbirdThe rusty blackbird (Euphagus carolinus) is a medium-sized New World blackbird, closely re
- Rusty-backed antwrenThe rusty-backed antwren (Formicivora rufa) is a species of bird in the family Thamnophili
- Rusty-spotted catSmall wild cat species native to South Asia
- RutelinaeRutelinae or shining leaf chafers is a subfamily of the scarab beetles (family Scarabaeida
- Ruthenium redThe inorganic dye ammoniated ruthenium oxychloride, also known as ruthenium red, is used i
- RuyangosaurusRuyangosaurus (Ruyang County lizard) is a genus of titanosauriform sauropod dinosaur recov
- RyelandBreed of sheep
- RynchopsGenus of birds
- Ryukyu flying foxSpecies of bat
- Ryukyu robinThe Ryukyu robin (Larvivora komadori) is a bird endemic to the Ryūkyū Islands, of Japan. T
