Página en construcción
- Bígaro bravo (Littorina saxatilis) [MOLLUSCA, Gastropoda, Littorinimorpha]
- Bígaro común (Littorina littorea) [MOLLUSCA, Gastropoda, Littorinimorpha]
- Bígaro chato (Littorina obtusata) [MOLLUSCA, Gastropoda, Littorinimorpha]
- Bígaro enano (caracolillo negro) (Melarhaphe neritoides) [MOLLUSCA, Gastropoda, Littorinimorpha]
- Bighorn (carnero de las montañas Rocosas) (Ovis canadensis) [CHORDATA, Mammalia, Artiodactyla]
- Bigotudo:
- Bigotudo común (Panurus biarmicus) [CHORDATA, Aves, Passeriformes]
- Bigotudo chino (Suthora webbiana) [CHORDATA, Aves, Passeriformes]
- Bigotudo de Blyth (Suthora blythi) [CHORDATA, Aves, Passeriformes]
- Bigotudo de cabeza gris (Psilopogon flavifrons) [CHORDATA, Aves, Piciformes]
- Bigotudo de frente negra (Psilopogon nigrifrons) [CHORDATA, Aves, Piciformes]
- Bigotudo de Gould (Psilopogon haemacephalus) [CHORDATA, Aves, Piciformes]
- Bilby (bandicut) (Macrotis lagotis) [CHORDATA, Mammalia, Peramelemorphia]
- Binturong (Arctictis binturong) [CHORDATA, Mammalia, Carnivora]
- Biquir (políptero) (Polypterus senegalus) [CHORDATA, Actinopterygii, Polypteriformes]
- Bisbita:
- Bisbita arbóreo (Anthus trivialis) [CHORDATA, Aves, Passeriformes]
- Bisbita campestre (Anthus campestris) [CHORDATA, Aves, Passeriformes]
- Bisbita común (Anthus pratensis) [CHORDATA, Aves, Passeriformes]
- Bisbita de Bogotá (Anthus bogotensis) [CHORDATA, Aves, Passeriformes]
- Bisbita de los pastizales (Anthus spragueii) [CHORDATA, Aves, Passeriformes]
- Bisbita de pecho amarillo (Anthus lutescens) [CHORDATA, Aves, Passeriformes]
- Bisbita de Richard (Anthus richardi) [CHORDATA, Aves, Passeriformes]
- Bisbita dorado (Anthus cervinus) [CHORDATA, Aves, Passeriformes]
- Bisbita ribereño (Anthus spinoletta) [CHORDATA, Aves, Passeriformes]
- Bisonte:
- Bisonte americano (Bison bison) [CHORDATA, Mammalia, Artiodactyla]
- Bisonte de bosque (Bison bison athabascae) [CHORDATA, Mammalia, Artiodactyla]
- Bisonte de la pradera (Bison bison bison) [CHORDATA, Mammalia, Artiodactyla]
- Bisonte europeo (Bison bonasus) [CHORDATA, Mammalia, Artiodactyla]
- Bitterling (bermejuela amarga) (Rhodeus amarus) [CHORDATA, Actinopterygii, Cypriniformes]
- Blanca del majuelo (piéridos) (Aporia crataegi) [ARTHROPODA, Insecta, Lepidoptera]
- Blanca esbelta (piéridos) (Leptidea sinapis) [ARTHROPODA, Insecta, Lepidoptera]
- Blanquiverdosa alpina (Pontia callidice) [ARTHROPODA, Insecta, Lepidoptera]
- Blaubok (hipotrago) (Hippotragus leucophaeus) [CHORDATA, Mammalia, Artiodactyla]
- Blenio:
- Blenio común (Lipophrys pholis) [CHORDATA, Actinopterygii, Blenniiformes]
- Blenio vivíparo (zoarces) (Zoarces viviparus) [CHORDATA, Actinopterygii, Perciformes]
- Blenio anguila (Blennius ocellaris) [CHORDATA, Actinopterygii, Blenniiformes]
- Blesbok (Damaliscus pygargus phillipsi) [CHORDATA, Mammalia, Artiodactyla]
- Blesmoll (rata topo) (Cryptomys hottentotus) [CHORDATA, Mammalia, Rodentia]
- Boa:
- Boa constrictor (Boa constrictor) [CHORDATA, Reptilia, Squamata]
- Boa de California (Charina bottae) [CHORDATA, Reptilia, Squamata]
- Boa desertícola (Lichanura trivirgata) [CHORDATA, Reptilia, Squamata]
- Boa esmeralda (Corallus caninus) [CHORDATA, Reptilia, Squamata]
- Bobi (Canis lupus familiaris) [CHORDATA, Mammalia, Carnivora]
- Boca de fuego (chanchito) (Thorichthys meeki) [CHORDATA, Actinopterygii, Cichliformes]
- Bocanegra (Ramphocelus carbo) [CHORDATA, Aves, Passeriformes]
- Bodión (Symphodus tinca) [CHORDATA, Actinopterygii, Labriformes]
- Bodión verde (lábridos) (Thalassoma pavo) [CHORDATA, Actinopterygii, Labriformes]
- Boga (Chondrostoma nasus) [CHORDATA, Actinopterygii, Cypriniformes]
- Bogavante:
- Bogavante común (Homarus gammarus) [ARTHROPODA, Crustacea, Decapoda]
- Bogavante (langosta de mar) (Palinurus elephas) [ARTHROPODA, Crustacea, Decapoda]
- Bongo (Tragelaphus eurycerus) [CHORDATA, Mammalia, Artiodactyla]
- Bonito (Sarda sarda) [CHORDATA, Actinopterygii, Scombriformes]
- Bonito del Norte (atún) (Thunnus alalunga) [CHORDATA, Actinopterygii, Scombriformes]
- Bontebok (Damaliscus pygargus pygargus) [CHORDATA, Mammalia, Artiodactyla]
- Boquerón (Engraulis encrasicolus) [CHORDATA, Actinopterygii, Clupeiformes]
- Boquidulce (Astyanax mexicanus) [CHORDATA, Actinopterygii, Characiformes]
- Borracho (cuclillo) (Coccyzus americanus) [CHORDATA, Aves, Cuculiformes]
- Bovinos (toro y vaca) (Bos taurus) [CHORDATA, Mammalia, Artiodactyla]
- Braquiópodos (Terebratulina retusa) [BRACHIOPODA, Rhynchonelliformea, Terebratulida]
- Brema:
- Brema blanca (b. plateada) (Blicca bjoerkna) [CHORDATA, Actinopterygii, Cypriniformes]
- Brema común (Abramis brama) [CHORDATA, Actinopterygii, Cypriniformes]
- Brema de mar (Acanthopagrus australis) [CHORDATA, Actinopterygii, Perciformes]
- Briozoos:
- Briozoos de agua dulce (Plumatella repens) [BRYOZOA, Phylactolaemata, Plumatellida]
- Brocado (Pterophyllum scalare) [CHORDATA, Actinopterygii, Cichliformes]
- Brolga (grulla) (Antigone rubicunda) [CHORDATA, Aves, Gruiformes]
- Broma (taraza) (Taraxacum officinale) [PLANTAE, Magnoliopsida, Asterales]
- Bruang (oso malayo) (Helarctos malayanus) [CHORDATA, Mammalia, Carnivora]
- Buccinos:
- Buccinos acanalado (Neptunea antiqua) [MOLLUSCA, Gastropoda, Neogastropoda]
- Buccinos áspero americano (Urosalpinx cinerea) [MOLLUSCA, Gastropoda, Neogastropoda]
- Buccinos común (b. blanco) (Buccinum undatum) [MOLLUSCA, Gastropoda, Neogastropoda]
- Buccinos de aguja (Colus jeffreysianus) [MOLLUSCA, Gastropoda, Neogastropoda]
- Buccinos pesados (Neptunea contraria) [MOLLUSCA, Gastropoda, Neogastropoda]
- Buccinos rojos (b. almendra) (Nassarius reticulatus) [MOLLUSCA, Gastropoda, Neogastropoda]
- Bulcónidos (Bulimus spp.) [MOLLUSCA, Gastropoda, Stylommatophora]
- Budell (Budellus spp.) [CHORDATA, Actinopterygii, Siluriformes]
- Buey (toro y vaca) (Bos taurus) [CHORDATA, Mammalia, Artiodactyla]
- Buey (cangrejo buey, crustáceo) (Cancer pagurus) [ARTHROPODA, Crustacea, Decapoda]
- Buey almizclado (Ovibos moschatus) [CHORDATA, Mammalia, Artiodactyla]
- Bufago:
- Bufago de pico amarillo (Buphagus africanus) [CHORDATA, Aves, Passeriformes]
- Bufago de pico rojo (Buphagus erythrorhynchus) [CHORDATA, Aves, Passeriformes]
- Búfalo (Syncerus caffer) [CHORDATA, Mammalia, Artiodactyla
- Búfalo asiático:
- Búfalo asiático indio (b. acuático, carabao) (Bubalus bubalis) [CHORDATA, Mammalia, Artiodactyla]
- Búfalo cafre:
- Búfalo cafre de bosque (Syncerus caffer nanus) [CHORDATA, Mammalia, Artiodactyla]
- Búho nival (Bubo scandiacus) [CHORDATA, Aves, Strigiformes]
- Búho poderoso (Ninox strenua) [CHORDATA, Aves, Strigiformes]
- Buitre:
- Buitre común (Gyps fulvus) [CHORDATA, Aves, Accipitriformes]
- Buitre de Angola (b. de la palmera de aceite) (Gypohierax angolensis) [CHORDATA, Aves, Accipitriformes]
- Buitre de cabeza blanca (Trigonoceps occipitalis) [CHORDATA, Aves, Accipitriformes]
- Buitre de cara lobulada (Torgos tracheliotos) [CHORDATA, Aves, Accipitriformes]
- Buitre de dorso blanco (Gyps africanus) [CHORDATA, Aves, Accipitriformes]
- Buitre de El Cabo (Gyps coprotheres) [CHORDATA, Aves, Accipitriformes]
- Buitre egipcio (alimoche) (Neophron percnopterus) [CHORDATA, Aves, Accipitriformes]
- Buitre indio (Gyps indicus) [CHORDATA, Aves, Accipitriformes]
- Buitre monje (b. encapuchado) (Aegypius monachus) [CHORDATA, Aves, Accipitriformes]
- Buitre negro asiático (Aegypius monachus) [CHORDATA, Aves, Accipitriformes]
- Buitre negro de la India (sucuni) (Aegypius monachus) [CHORDATA, Aves, Accipitriformes]
- Buitre negro europeo (Aegypius monachus) [CHORDATA, Aves, Accipitriformes]
- Buitre barbudo (quebrantahuesos) (Gypaetus barbatus) [CHORDATA, Aves, Accipitriformes]
- Buitrón (Cisticola juncidis) [CHORDATA, Aves, Passeriformes]
- Bulbul:
- Bulbul africano (Pycnonotus barbatus) [CHORDATA, Aves, Passeriformes]
- Bulbul cariblanco (Pycnonotus leucotis) [CHORDATA, Aves, Passeriformes]
- Bulbul cuellirrojo (Pycnonotus cafer) [CHORDATA, Aves, Passeriformes]
- Bulbul culirrojo (Pycnonotus jocosus) [CHORDATA, Aves, Passeriformes]
- Bulbul de cresta negra (Rubigula flaviventris) [CHORDATA, Aves, Passeriformes]
- Bulbul negro (Hypsipetes leucocephalus) [CHORDATA, Aves, Passeriformes]
- Bulbul pardo (b. verde) (Pycnonotus xanthopygos) [CHORDATA, Aves, Passeriformes]
- Bulbul terrero (Phyllastrephus terrestris) [CHORDATA, Aves, Passeriformes]
- Bunder (macaco) (Macaca mulatta) [CHORDATA, Mammalia, Primates]
- Burlón:
- Burlón azul (Mimus gilvus) [CHORDATA, Aves, Passeriformes]
- Burlón de los Galápagos (Mimus parvulus) [CHORDATA, Aves, Passeriformes]
- Burlón norteño (sinsonte) (Mimus polyglottos) [CHORDATA, Aves, Passeriformes]
- Buscarla pintoja (Locustella naevia) [CHORDATA, Aves, Passeriformes]
- Butú (delfín fluvial) (Inia geoffrensis) [CHORDATA, Mammalia, Cetacea]