Desde Dhole hasta Durgón
- Dhole:
- Dhole septentrional (Cuon alpinus) [Chordata, Mammalia, Carnivora]
- Diablo de mar (Mobula mobular)[Chordata, Chondrichthyes, Myliobatiformes]
- Diablo de Tasmania (Sarcophilus harrisii) [Chordata, Mammalia, Dasyuromorphia]
- Diamante =pájaro diamante (Taeniopygia guttata)[Chordata, Aves, Passeriformes]
- Diente de elefante (Dentalium entalis) [Mollusca, Scaphopoda, Dentaliida]
- Dik-Dik:
- Dik-Dik de Kirk (Madoqua kirkii) [Chordata, Mammalia, Artiodactyla]
- Dingo (Canis lupus dingo) [Chordata, Mammalia, Carnivora]
- Dipnoos:
- Dipnoos africano (Protopterus annectens)[Chordata, Sarcopterygii, Lepidosireniformes]
- Dipnoos australiano (Neoceratodus forsteri) [Chordata, Sarcopterygii, Ceratodontiformes]
- Dipnoos sudamericano (Lepidosiren paradoxa) [Chordata, Sarcopterygii, Lepidosireniformes]
- Disco:
- Disco azul (Symphysodon aequifasciatus haraldi) [Chordata, Actinopterygii, Cichliformes]
- Disco pardo (Symphysodon aequifasciatus axelrodi) [Chordata, Actinopterygii, Cichliformes]
- Disco verde (Symphysodon aequifasciatus aequifasciatus) [Chordata, Actinopterygii, Cichliformes]
- Ditisco (Dytiscus marginalis) [Arthropoda, Insecta, Coleoptera]
- Dólar de la arena:
- Dólar de la arena de bocallave (Mellita quinquiesperforata)[Echinodermata, Echinoidea, Clypeasteroida]
- Dólar de la arena de escudo (Mellita quinquiesperforata)[Echinodermata, Echinoidea, Clypeasteroida]
- Doncel (Pseudoplatystoma fasciatum) [Chordata, Actinopterygii, Siluriformes]
- Doncella (Pseudoplatystoma tigrinum) [Chordata, Actinopterygii, Siluriformes]
- Dormilega:
- Dormilega de la roca (Aidablennius sphynx)[Chordata, Actinopterygii, Perciformes]
- Dormilón (Dormitator latifrons) [Chordata, Actinopterygii, Gobiiformes]
- Dorso de vela listado (Holocentrus adscensionis) [Chordata, Actinopterygii, Beryciformes]
- Dragón (Draco volans) [Chordata, Reptilia, Squamata]
- Dragón barbudo (Pogona vitticeps) [Chordata, Reptilia, Squamata]
- Dragón de Komodo (Varanus komodoensis) [Chordata, Reptilia, Squamata]
- Dragón de mar (Phycodurus eques) [Chordata, Actinopterygii, Syngnathiformes]
- Dragoncillo (Callionymus lyra) [Chordata, Actinopterygii, Perciformes]
- Dragoncillo moteado (Callionymus maculatus) [Chordata, Actinopterygii, Perciformes]
- Dril (Mandrillus leucophaeus) [Chordata, Mammalia, Primates]
- Driomio (Dryomys nitedula) [Chordata, Mammalia, Rodentia]
- Droma cangrejero (Dromas ardeola) [Chordata, Aves, Charadriiformes]
- Dromedario (Camelus dromedarius) [Chordata, Mammalia, Artiodactyla]
- Drongo:
- Drongo de lentejuela (Dicrurus bracteatus)[Chordata, Aves, Passeriformes]
- Drongo común del África tropical (Dicrurus adsimilis)[Chordata, Aves, Passeriformes]
- Drongo con cola de raqueta (Dicrurus paradiseus)[Chordata, Aves, Passeriformes]
- Drongocon manto de terciopelo (Dicrurus aeneus)[Chordata, Aves, Passeriformes]
- Drongo cuclillo de la India (Surniculus lugubris)[Chordata, Aves, Passeriformes]
- Drongo negro =cuervo rey (Dicrurus macrocercus)[Chordata, Aves, Passeriformes]
- Drosófila = mosca de la fruta (Drosophila melanogaster) [Arthropoda, Insecta, Diptera]
- Drosófila mediterránea (Ceratitis capitata) [Arthropoda, Insecta, Diptera]
- Duela del hígado:
- Duela del hígado del pulmón (Paragonimus westermani) [Platyhelminthes, Trematoda, Plagiorchiida]
- Duela del hígado intestinal (Fasciola hepatica) [Platyhelminthes, Trematoda, Echinostomida]
- Duela del hígado común (Fasciola hepatica) [Platyhelminthes, Trematoda, Echinostomida]
- Duela del hígado china (Clonorchis sinensis) [Platyhelminthes, Trematoda, Opisthorchiida]
- Dugongo (Dugong dugon) [Chordata, Mammalia, Sirenia]
- Duiker (Cephalophus spp.) [Chordata, Mammalia, Artiodactyla]
- Duiker cebra (Cephalophus zebra) [Chordata, Mammalia, Artiodactyla]
- Durdo (Coracina novaehollandiae)[Chordata, Aves, Passeriformes]
- Durgón (Balistes vetula)[Chordata, Actinopterygii, Tetraodontiformes]