Imagine a world teeming with life, from the soaring heights of the sky to the mysterious depths of the ocean. This article presents an A to Z journey through the animal kingdom, offering a unique glimpse into the lives of diverse species ranging from mammals to arachnids. As we navigate from the letter A, introducing animals like the majestic Albatross, to Z, closing with the zealous Zebra, we invite you to join us on this voyage of discovery.
Each letter serves as a gateway to understanding the remarkable adaptations and behaviors that allow these creatures to thrive in their respective habitats. By exploring the varied list of mammals, birds, amphibians, fish, insects, and arachnids, we not only celebrate the incredible diversity of our planet but also underscore the importance of conservation efforts. Let this alphabetical exploration enrich your knowledge and ignite your passion for the natural world as we transition seamlessly into the heart of this captivating guide.
Animals that Start with a
Mammals
- Aardvark
- Aardwolf
- African Buffalo
- African Elephant
- African Leopard
- Agouti
- Alpaca
- American Bison
- American Black Bear
- Anteater (Giant Anteater, Silky Anteater)
- Antelope (various species, e.g., Addax, Arabian Oryx)
- Arctic Fox
- Arctic Hare
- Armadillo (various species)
- Asian Elephant
- Asiatic Black Bear
- Ass (Donkey)
- Australian Cattle Dog
- Australian Shepherd
- Aye-aye
Birds
- Albatross (various species)
- American Dipper
- American Goldfinch
- American Kestrel
- American Robin
- Andean Cock-of-the-rock
- Andean Condor
- Anna’s Hummingbird
- Anhinga
- Arctic Tern
- Atlantic Puffin
- Avocet
- Azure Tit
- Azure Kingfisher
Reptiles
- Adder (various species)
- African Spurred Tortoise
- Alligator (American Alligator, Chinese Alligator)
- Alligator Snapping Turtle
- Anaconda (Green Anaconda)
- Anole (various species)
- Asp Viper
Amphibians
- Axolotl
- African Bullfrog
- American Toad
- Amazon Milk Frog
Fish
- Angelfish (Freshwater and Saltwater species)
- Anglerfish (various species)
- Arctic Char
- Arowana
- Atlantic Cod
- Atlantic Herring
- Atlantic Salmon
- Anchovy
Insects
- Ant (various species, e.g., Army Ant, Leafcutter Ant)
- Aphid
- Atlas Moth
- Australian Emperor (dragonfly)
- Assassin Bug
Arachnids
- Araneae (Spiders, various species)
- Acarina (Ticks and Mites, various species)
- Australian Funnel-web Spider
Miscellaneous
- Acanthocephala (Parasitic phylum known as spiny-headed worms)
- Anemone (Sea Anemones, various species)
- Anglerfish (various deep-sea species)
- Arrow Worms (Chaetognatha, a phylum of predatory marine worms)
Animals that Start with B
Mammals
- Baboon
- Badger
- Baleen Whale
- Banded Mongoose
- Bat (various species)
- Bearded Dragon (not a mammal, but often mistakenly referred to due to its name)
- Bear (various species, e.g., Brown Bear, Black Bear, Polar Bear)
- Beaver
- Bighorn Sheep
- Bilby
- Bison
- Black Panther (a melanistic variant of leopards or jaguars)
- Black Rhinoceros
- Blue Whale
- Bobcat
- Bonobo
- Bongo
- Boxer Dog
- Brazilian Tapir
- Brown Bear
- Buffalo (African Buffalo, Water Buffalo)
- Bushbaby
Birds
- Bald Eagle
- Baltimore Oriole
- Barn Owl
- Barn Swallow
- Barred Owl
- Bee-eater
- Bellbird
- Bittern
- Blackbird
- Black-Capped Chickadee
- Black-Footed Albatross
- Black Hawk
- Blue Jay
- Blue-Footed Booby
- Booby (various species)
- Brambling
- Budgerigar (Budgie)
- Bulbul
- Buzzard
Reptiles
- Basilisk
- Bearded Dragon
- Black Mamba
- Boa Constrictor
- Box Turtle
- Burmese Python
Amphibians
- Bullfrog
- Burrowing Frog
Fish
- Barracuda
- Bass (various species)
- Beluga Sturgeon
- Betta Fish (Siamese Fighting Fish)
- Bichir
- Blue Tang
- Bluefin Tuna
- Butterflyfish
Insects
- Bumblebee
- Butterfly (various species, e.g., Blue Morpho, Monarch Butterfly)
- Beetle (various species, e.g., Bark Beetle, Dung Beetle)
Arachnids
- Black Widow Spider
- Brown Recluse Spider
- Brazilian Wandering Spider
Miscellaneous
- Box Jellyfish
- Brittle Star (a type of Ophiuroidea)
- Bull Shark
- Blue-ringed Octopus
Animals that Start with C
Mammals
- Capybara
- Caracal
- Cheetah
- Chimpanzee
- Chipmunk
- Coati
- Cougar
- Coyote
- Chinchilla
- Common Dolphin
- Camel
- Canadian Lynx
- Clouded Leopard
- Colugo
Birds
- Canary
- Cockatoo
- Condor
- Cormorant
- Crane
- Crow
- Cuckoo
- Curlew
- Cassowary
- Canada Goose
- Common Loon
Reptiles
- Cobra
- Crocodile
- Chameleon
- Caiman
- Chuckwalla
- Common Iguana
- Cottonmouth
Amphibians
- Caecilian
- Common Frog
- Crested Newt
Fish
- Clownfish
- Cod
- Coelacanth
- Catfish
- Carp
- Clown Loach
Insects
- Cicada
- Cockroach
- Cricket
- Caterpillar
- Carpenter Ant
- Cabbage White Butterfly
Arachnids
- Camel Spider
- Common House Spider
- Crab Spider
Miscellaneous
- Coral (various species within the Cnidaria phylum)
- Cuttlefish
- Clam
- Conch
Animals that Start with D
Mammals
- Deer (various species, e.g., White-tailed deer)
- Dolphin (various species, e.g., Bottlenose dolphin)
- Dingo
- Dhole
- Donkey
- Dromedary Camel
- Duiker (various species)
- Dusky Dolphin
- Dwarf Mongoose
Birds
- Dove (various species)
- Duck (various species, e.g., Mallard duck)
- Dunlin
- Darter
- Dickcissel
- Drongo
- Dodo (extinct)
Reptiles
- Diamondback Rattlesnake
- Dinosaur (extinct – various species, e.g., Diplodocus, Tyrannosaurus)
- Desert Tortoise
- Dragonfly (though not a reptile, fits no other category well)
- Draco Lizard
Amphibians
- Dart Frog (various species, e.g., Poison dart frog)
- Desert Rain Frog
Fish
- Damselfish
- Discus
- Dragonet
- Dace
- Dogfish (various species)
- Dory
Insects
- Dragonfly
- Damselfly
- Dung Beetle
- Deer Tick
Arachnids
- Daddy Longlegs (also known as Harvestmen)
- Desert Scorpion
Miscellaneous
- Dugong
- Dolphin Fish (Mahi-mahi)
- Daphnia (a type of small planktonic crustaceans)
Animals that Start with E
Mammals
- Elephant (African and Asian species)
- Elk
- Echidna
- Ermine
- European Bison
- Eastern Lowland Gorilla
- Eastern Grey Kangaroo
- Ethiopian Wolf
Birds
- Eagle (various species, e.g., Bald eagle, Golden eagle)
- Emu
- Egret
- Eastern Bluebird
- European Robin
- Eurasian Magpie
- Egyptian Vulture
- Elf Owl
Reptiles
- Eastern Diamondback Rattlesnake
- Eastern Box Turtle
- Emerald Tree Boa
- Eyelash Viper
- European Adder
Amphibians
- Eastern Newt
- European Tree Frog
- Edible Frog
Fish
- Eel (various species, e.g., American eel, European eel)
- Electric Eel
- Emperor Angelfish
- European Perch
- Elephant Fish
Insects
- Earwig
- Eastern Hercules Beetle
- Emperor Moth
- European Hornet
Arachnids
- European Garden Spider
- Emperor Scorpion
Miscellaneous
- Earthworm
- Echinoderms (such as Sea Urchins and Starfish, various species)
- Electric Ray
Animals that Start with F
Mammals
- Fennec Fox
- Ferret
- Fin Whale
- Fishing Cat
- Flying Fox (Fruit Bats)
- Fox (various species, e.g., Red Fox, Arctic Fox)
- Fossa
- Fruit Bat
Birds
- Falcon (various species, e.g., Peregrine Falcon)
- Flamingo
- Finch (various species)
- Flycatcher (various species)
- Frigatebird
Reptiles
- Frilled Lizard
- False Coral Snake
- Florida Box Turtle
- Fence Lizard
Amphibians
- Fire-Bellied Toad
- Fire Salamander
- Frogmouth (bird, but name fits here due to naming convention)
Fish
- Flying Fish
- Flounder
- Fangtooth
- Filefish
- Freshwater Eel
Insects
- Firefly
- Flea
- Fruit Fly
- Fire Ant
Arachnids
- Fishing Spider
Miscellaneous
- Flatworm
- Fiddler Crab
Animals that Start with G
Mammals
- Giraffe
- Gorilla
- Giant Panda
- Gibbon
- Gazelle
- Groundhog
- Grizzly Bear
- Grey Seal
- Guanaco
- Gnu (Wildebeest)
Birds
- Goldfinch
- Goose (various species)
- Goshawk
- Grackle
- Grebe
- Grosbeak
- Guillemot
- Gull
- Gyrfalcon
Reptiles
- Gecko (various species)
- Gharial
- Green Sea Turtle
- Gaboon Viper
- Gila Monster
Amphibians
- Glass Frog
- Green Tree Frog
Fish
- Guppy
- Gar
- Goby (various species)
- Goldfish
- Goliath Grouper
- Great White Shark
Insects
- Grasshopper
- Goliath Beetle
- Glowworm
- Giant Weta
Arachnids
- Garden Spider
- Granddaddy Longlegs (another name for Daddy Longlegs or Harvestmen)
Miscellaneous
- Giant Clam
- Giant Squid
- Gorgonian (a type of coral)
Animals that Start with H
Mammals
- Hippopotamus
- Hedgehog
- Hyena
- Humpback Whale
- Hamster
- Hare
- Himalayan Tahr
- Hoary Bat
- Howler Monkey
- Human
Birds
- Hawk (various species)
- Heron
- Hummingbird (various species)
- Honeyeater
- Hornbill
- Hoopoe
- Harpy Eagle
- House Finch
- House Sparrow
Reptiles
- Horned Viper
- Hognose Snake
- Hellbender
- Hawksbill Turtle
- Hermann’s Tortoise
Amphibians
- Horned Frog
- Hyla Tree Frog
Fish
- Haddock
- Halibut
- Hammerhead Shark
- Herring
- Hippocampus (Seahorse)
- Hoki
Insects
- Honeybee
- Hornet
- Horsefly
- Hoverfly
Arachnids
- Harvestman (Daddy Longlegs)
- Huntsman Spider
Miscellaneous
- Horseshoe Crab
- Hydra
Animals that Start with I
Mammals
- Ibex
- Iberian Lynx
- Impala
- Indian Elephant
- Indian Rhinoceros
- Indri
- Irish Setter (Though a dog breed, included for its distinct name)
- Italian Greyhound (Similarly, a dog breed)
Birds
- Ibis (various species)
- Icelandic Sheepdog (A dog breed, yet notable for its name)
- Imperial Eagle
- Indian Peafowl
- Indigo Bunting
- Ivory Gull
Reptiles
- Iguana (Green Iguana, Marine Iguana)
- Indian Cobra
- Inland Taipan
Amphibians
- Ichthyophis (a genus of caecilians)
Fish
- Icefish
- Ide
- Iridescent Shark (a type of catfish, not a true shark)
- Immortal Jellyfish (Turritopsis dohrnii, technically not a fish but included for its intriguing name)
Insects
- Ichneumon Wasp
- Imperial Moth
- Ironclad Beetle
Arachnids
- (No widely recognized arachnids with common names starting with “I”)
Miscellaneous
- Irish Moss (a type of seaweed, included for its distinct name)
- Ivory-Billed Woodpecker (Critically endangered or possibly extinct, included for its importance)
Animals that Start with J
Mammals
- Jaguar
- Jackrabbit
- Japanese Macaque
- Jerboa
Birds
- Jackdaw
- Jay (various species, e.g., Blue Jay)
- Junco
- Junglefowl
- Jacana
Reptiles
- Jackson’s Chameleon
- Jamaican Boa
Amphibians
- Japanese Giant Salamander
- Java Frog
Fish
- Jack Dempsey (a type of cichlid)
- Jellyfish (technically not a fish, but often included in common vernacular)
- John Dory
Insects
- Jewel Beetle
- June Bug
- Jumper Ant
Arachnids
- Jumping Spider
Miscellaneous
- Jellyfish (not a fish but a marine invertebrate belonging to the phylum Cnidaria)
Animals that Start with K
Mammals
- Kangaroo
- Koala
- Killer Whale (Orca)
- Kinkajou
- Kudu
Birds
- Kiwi
- Kingfisher
- Kite (various species, e.g., Black Kite)
- Kakapo
- Kestrel
Reptiles
- Komodo Dragon
- Kingsnake
- Kemp’s Ridley Sea Turtle
Amphibians
- Kassina (a genus of African running frogs)
- Knob-tailed Gecko (though a reptile, geckos are sometimes mistakenly referred to in common names for amphibians)
Fish
- Koi
- Killifish
- King Mackerel
- Knifefish
Insects
- Katydid
- Kissing Bug
- Karner Blue (butterfly)
Arachnids
- King Baboon Spider
Miscellaneous
- Krill (a crucial part of oceanic food chains)
Animals that Start with L
Mammals
- Lion
- Leopard
- Lemur
- Lynx
- Llama
- Labrador Retriever
- Leopon (hybrid between a leopard and a lion)
- Langur
Birds
- Lark
- Loon
- Lyrebird
- Lapwing
- Laughing Kookaburra
- Lady Amherst’s Pheasant
Reptiles
- Leatherback Sea Turtle
- Legless Lizard
- Leopard Gecko
- Lizard (general category, including various species)
Amphibians
- Leopard Frog
- Lungfish (though technically a fish, its name reflects its unique adaptation)
Fish
- Lionfish
- Largemouth Bass
- Lumpfish
- Lamprey
Insects
- Ladybug
- Locust
- Luna Moth
- Leafcutter Ant
Arachnids
- Lynx Spider
Miscellaneous
- Lobster
- Leech
- Lamprey (again, due to its unique characteristics, fitting both fish and “oddities”)
Animals that Start with M
Mammals
- Macaque
- Manatee
- Mandrill
- Marmoset
- Marmot
- Meerkat
- Mink
- Mole
- Mongoose
- Monkey (various species)
- Moose
- Mountain Goat
- Mouse
- Muskox
- Myrmecophaga (Giant Anteater)
Birds
- Macaw
- Magellanic Penguin
- Magpie
- Mallard
- Mandarin Duck
- Marabou Stork
- Meadowlark
- Mockingbird
- Myna Bird
Reptiles
- Marine Iguana
- Monitor Lizard
- Moray Eel (though technically a fish, commonly grouped with reptilian appearances)
- Mud Turtle
Amphibians
- Mudskipper (a fish with amphibious traits)
- Mudpuppy
Fish
- Mackerel
- Mahi-Mahi
- Manta Ray
- Marlin
- Minnow
- Monkfish
- Moray Eel
- Mudskipper
Insects
- Mantis (Praying Mantis)
- Mayfly
- Mealworm
- Monarch Butterfly
- Mosquito
- Moth (various species)
Arachnids
- Mexican Redknee Tarantula
Miscellaneous
- Man-of-War (Portuguese Man-of-War, a marine cnidarian)
- Mussel
- Mollusk (general category, including various species)
Animals that Start with N
Mammals
- Narwhal
- Newt (though technically an amphibian, commonly mistaken in general discussions)
- Numbat
- Nutria
- Nyala
- Nilgai
Birds
- Nightingale
- Nuthatch
- Nightjar
- Northern Cardinal
- Northern Flicker
- New Zealand Kiwi
Reptiles
- Nile Crocodile
- Newt (amphibian, but included here for its reptile-like appearance)
- Naja (genus of cobras)
- Northern Alligator Lizard
Amphibians
- Newt
- Natterjack Toad
Fish
- Neon Tetra
- Nurse Shark
- Narwhal (mammal, but often associated with marine themes)
- Napoleon Wrasse
Insects
- Nymph (immature stage of certain insects)
- No-See-Um (biting midges)
- Net-winged Beetle
Arachnids
- Nursery Web Spider
Miscellaneous
- Nautilus
Animals that Start with O
Mammals
- Orangutan
- Ocelot
- Otter (various species, e.g., Sea Otter, River Otter)
- Okapi
- Opossum
- Orca (Killer Whale)
- Ox
Birds
- Owl (various species, e.g., Barn Owl, Snowy Owl)
- Ostrich
- Osprey
- Oriole
- Ovenbird
- Oystercatcher
Reptiles
- Olive Sea Snake
- Orinoco Crocodile
- Ornate Box Turtle
- Ouroboros (symbolic, not an actual species but often associated with ancient depictions of serpents or dragons)
Amphibians
- Olm
- Oriental Fire-bellied Toad
Fish
- Oscar
- Opah (also known as Moonfish)
- Orange Roughy
- Oarfish
Insects
- Orchard Oriole (bird, but included here for its common association with orchards and insects)
- Orb-weaver Spider (arachnid, known for their circular webs)
- Oak Beauty (a type of moth)
Arachnids
- Orb-weaver Spider
Miscellaneous
- Octopus
- Oyster
- Orca (listed again under mammals, but noteworthy for its prominence in marine ecosystems)
Animals that Start with P
Mammals
- Panda
- Panther
- Platypus
- Polar Bear
- Porcupine
- Prairie Dog
- Puma
- Pangolin
- Pygmy Hippopotamus
Birds
- Parrot (various species, e.g., African Grey Parrot)
- Peacock
- Pelican
- Penguin
- Pheasant
- Pigeon
- Puffin
Reptiles
- Python
- Panther Chameleon
- Painted Turtle
- Pit Viper
Amphibians
- Poison Dart Frog
- Pacific Tree Frog
Fish
- Piranha
- Pufferfish
- Pike
- Perch
- Plaice
Insects
- Praying Mantis
- Painted Lady (butterfly)
- Peach Aphid
Arachnids
- Peacock Spider
Miscellaneous
- Portuguese Man o’ War (not a jellyfish, but a siphonophore, a colony of specialized marine organisms)
- Plankton (encompassing various microscopic organisms that drift in the ocean currents)
Animals that Start with Q
Mammals
- Quokka
- Quoll
Birds
- Quail
- Quetzal
Reptiles
- (There are no widely recognized reptiles with names that start with “Q” in common nomenclature)
Amphibians
- (Similarly, there are no widely recognized amphibians with names that start with “Q” in common nomenclature)
Fish
- Queen Angelfish
- Quillback
Insects
- Queen Alexandra’s Birdwing (the largest butterfly in the world)
- Quagga Midge
Arachnids
- (There are no widely recognized arachnids with names that start with “Q” in common nomenclature)
Miscellaneous
- Quahog (a type of clam)
Animals that Start with R
Mammals
- Rabbit
- Raccoon
- Rat
- Red Panda
- Reindeer
- Rhinoceros
- Ring-tailed Lemur
- River Dolphin
- Rottweiler
Birds
- Raven
- Red-tailed Hawk
- Robin
- Rockhopper Penguin
- Rosella
- Roadrunner
- Ruff
Reptiles
- Rattlesnake
- Red-eared Slider
- Rhinoceros Iguana
- Royal Python
Amphibians
- Red-eyed Tree Frog
- Rough-skinned Newt
Fish
- Rainbow Trout
- Rasbora
- Red Snapper
- Remora
- Rockfish
Insects
- Rhinoceros Beetle
- Robber Fly
- Red Admiral (butterfly)
Arachnids
- Redback Spider
- Recluse Spider
Miscellaneous
- Ray (several species like Manta Ray, Stingray)
- Sea Urchin (specifically Red Sea Urchin)
Animals that Start with S
Mammals
- Sloth
- Squirrel
- Snow Leopard
- Swan (though technically a bird, often mistakenly referred to in various contexts)
- Saola
- Serval
- Sheep
- Skunk
- Sperm Whale
- Sun Bear
- Sable Antelope
- Sea Lion
Birds
- Sparrow
- Swan
- Secretary Bird
- Shoebill
- Stork
- Sandpiper
- Seagull
- Snowy Owl
- Scarlet Macaw
- Spoonbill
Reptiles
- Snake (various species)
- Skink
- Sea Turtle
- Saltwater Crocodile
- Sidewinder (a type of rattlesnake)
Amphibians
- Salamander
- Siamese Crocodile (though a reptile, sometimes confused due to naming)
- Spring Peeper
Fish
- Shark (various species)
- Salmon
- Swordfish
- Seahorse
- Sardine
- Stingray
Insects
- Spider (various species)
- Scorpion
- Silverfish
- Swallowtail Butterfly
- Stag Beetle
Arachnids
- Scorpion
- Spider
Miscellaneous
- Sea Urchin
- Starfish
- Sponge
- Squid
Animals that Start with T
Mammals
- Tiger
- Tasmanian Devil
- Tapir
- Tamarin
- Tenrec
- Tarsier
- Thomson’s Gazelle
- Tree Kangaroo
- Takin
Birds
- Toucan
- Turkey
- Tern
- Thrush
- Tawny Owl
- Trumpeter Swan
- Tinamou
- Titmouse
Reptiles
- Turtle (various species)
- Tortoise (various species)
- Taipan
- Tuatara
- Timber Rattlesnake
- Tokay Gecko
Amphibians
- Toad (various species)
- Tree Frog (various species)
- Tiger Salamander
Fish
- Trout (various species)
- Tuna (various species)
- Tetra (various species)
- Tarpon
- Tiger Shark
- Tilapia
Insects
- Termite
- Tsetse Fly
- Tarantula Hawk (a wasp species, despite the name)
- Tiger Beetle
Arachnids
- Tarantula
- Tick
Miscellaneous
- Tardigrade (also known as water bears or moss piglets, a phylum of water-dwelling micro-animals)
- Trilobite (extinct)
Animals that Start with U
Mammals
- Uakari (a type of monkey)
- Ugandan Kob (a type of antelope)
- Urial (a type of wild sheep)
Birds
- Umbrellabird
- Upland Sandpiper
- Ural Owl
Reptiles
- Uromastyx (a genus of lizard known as spiny-tailed lizards)
- (There are no widely recognized reptiles starting with “U” beyond the Uromastyx)
Amphibians
- (There are no widely recognized amphibians with names that start with “U” in common nomenclature)
Fish
- Unicorn Fish
- Uaru (a type of cichlid fish)
- Upside-Down Catfish
Insects
- Ulysses Butterfly (a strikingly blue butterfly)
- (Specific insects starting with “U” are less commonly named, making the Ulysses butterfly a notable exception)
Arachnids
- (There are no widely recognized arachnids with names that start with “U” in common nomenclature)
Miscellaneous
- Urchin (Sea Urchin, a type of marine invertebrate)
Animals that Start with V
Mammals
- Vampire Bat
- Vicuña
- Vole
- Vervet Monkey
- Vaquita (a type of porpoise, critically endangered)
Birds
- Vulture (various species)
- Vermilion Flycatcher
- Victoria Crowned Pigeon
- Violet-green Swallow
- Vireo (various species)
Reptiles
- Viper (various species)
- Varanus (genus that includes monitor lizards)
- Veiled Chameleon
Amphibians
- Vietnamese Mossy Frog
- Variable Harlequin Frog
Fish
- Vampire Tetra
- Velvetfish
- Volitan Lionfish
Insects
- Velvet Ant (a type of wasp despite the name)
- Viceroy Butterfly
- Variegated Grasshopper
Arachnids
- Vinegaroon (also known as whip scorpions)
Miscellaneous
- Velvet Worm (an example of Onychophora, an invertebrate phylum)
Animals that Start with W
Mammals
- Wolf (various species, including the Gray Wolf)
- Walrus
- Wombat
- Whale (various species, such as the Blue Whale and Humpback Whale)
- Warthog
- Weasel
- White Rhinoceros
- Wildebeest
- Water Buffalo
Birds
- Woodpecker (various species)
- Warbler (various species)
- Waxwing (various species)
- Weka
- Whooping Crane
- Wren (various species)
- White Ibis
- Wood Duck
- Wedge-tailed Eagle
Reptiles
- Wall Lizard
- Water Dragon
- Whip Snake
- Western Diamondback Rattlesnake
Amphibians
- Wood Frog
- Waxy Monkey Tree Frog
- Western Toad
Fish
- Walleye
- Whale Shark
- Wrasse (various species)
- Whitefish (various species)
- Wobbegong (a type of shark)
Insects
- Wasp (various species)
- Water Strider
- Weevil (various species)
- Woolly Bear Caterpillar (the larval stage of the Isabella Tiger Moth)
Arachnids
- Wolf Spider
- Whip Scorpion (also known as Vinegaroon)
Miscellaneous
- Water Bear (Tardigrade, a micro-animal known for its extreme durability)
Animals that Start with X
Mammals
- Xerus (a genus of African ground squirrels)
Birds
- Xantus’s Hummingbird
- Xenops (a genus of birds in the Furnariidae family, found in the Neotropics)
Reptiles
- Xenosaurus (a genus of lizards from Mexico and Central America)
Amphibians
- Xenopus (a genus of African clawed frogs)
Fish
- Xiphias Gladius (the scientific name for the swordfish)
- X-ray Tetra (a small fish known for its translucent body)
Insects
- Xylocopa (the genus of large carpenter bees)
Arachnids
- (There are no widely recognized arachnids with names that start with “X” in common nomenclature)
Miscellaneous
- (Additional categories do not typically feature well-known animals starting with “X”)
Animals that Start with Y
Mammals
- Yak
- Yellow Mongoose
- Yellow-footed Rock Wallaby
- Yucatan Squirrel
Birds
- Yellowhammer
- Yellowfinch
- Yellow-legged Gull
- Yellowthroat
- Yellow Warbler
- Yucatan Woodpecker
Reptiles
- Yellow-bellied Sea Snake
- Yellow-spotted Tropical Night Lizard
- Yacare Caiman
Amphibians
- Yellow-banded Poison Dart Frog
- Yosemite Toad
Fish
- Yellowfin Tuna
- Yellowtail (several species, including the Yellowtail Amberjack and Yellowtail Snapper)
- Yellow Perch
Insects
- Yellowjacket (a type of wasp)
- Yellow Woolly Bear (the larva of the Virginia Tiger Moth)
Arachnids
- (There are no widely recognized arachnids starting with “Y” in common nomenclature)
Miscellaneous
- Yeti Crab (a type of hydrothermal vent crab known for its hairy claws)
Animals that Start with Z
Mammals
- Zebra (various species, including the Plains Zebra and the Mountain Zebra)
- Zebu
- Zorilla (also known as the Striped Polecat)
Birds
- Zebra Finch
- Zenaida Dove
- Zone-tailed Hawk
- Zitting Cisticola
Reptiles
- Zebra Shark
- Zigzag Salamander
Amphibians
- Zambezi River Frog
- Zimbabwe Reed Frog
Fish
- Zander
- Zebrafish
- Zebra Pleco
Insects
- Zebra Swallowtail (a butterfly)
- Zebra Jumping Spider
Arachnids
- Zebra Tarantula
Miscellaneous
- Zooplankton (a broad category rather than a specific species, encompassing various microscopic organisms drifting in oceans, seas, and bodies of fresh water)
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