Animals That Start With Y: Names, Types, and Verified Facts
Animals that start with Y include the yabby, yak, Yarkand hare, yellow anaconda, yellow-bellied marmot, yellow-bellied sapsucker, yellow-bellied sea snake, yellow-eyed penguin, yellowfin tuna, yellow-footed rock-wallaby, yellowhammer, yellowjacket, yellow mongoose, yellow perch, yellow tang, yellowtail snapper, Yeti crab, Yucatan jay, yucca moth, and Yunnan snub-nosed monkey.
Y has fewer basic animal names than many letters, yet it becomes much richer once established compound names are included.
The word yellow accounts for a large portion of the inventory. Some names refer directly to coloration, such as yellow mongoose and yellow perch. Others highlight one particular feature, such as the yellow-eyed penguin or yellow-footed rock-wallaby. Yellowfin tuna and yellowtail snapper are named partly for conspicuous fin coloration.
Several names also require classification context.
A yabby is a freshwater crayfish, making it a crustacean. A yellowjacket is a wasp, while a Yeti crab is a deep-sea crustacean rather than a mythical creature. The yellow-bellied sea snake is a true marine reptile that can spend its entire life at sea, while the yellow-eyed penguin is a flightless seabird found only in New Zealand.
Yak creates another important distinction. Wild yak and domestic yak are closely related but are generally treated under different scientific names, Bos mutus and Bos grunniens, respectively.
For these reasons, there is no official scientific census of every animal whose English name begins with Y.
Quick List of 50 Animals That Start With Y
| Animal | Animal Group |
| Yabby | Crustacean |
| Yak | Mammal |
| Yarkand hare | Mammal |
| Yarara | Reptile |
| Yellow anaconda | Reptile |
| Yellow aphid | Insect |
| Yellow bass | Fish |
| Yellow-bellied marmot | Mammal |
| Yellow-bellied sapsucker | Bird |
| Yellow-bellied sea snake | Reptile |
| Yellow-bellied slider | Reptile |
| Yellow boxfish | Fish |
| Yellow-crowned night heron | Bird |
| Yellow crazy ant | Insect |
| Yellow-edged moray | Fish |
| Yellow-eyed penguin | Bird |
| Yellow-faced bee | Insect |
| Yellowfin surgeonfish | Fish |
| Yellowfin tuna | Fish |
| Yellow-footed rock-wallaby | Mammal |
| Yellow-footed tortoise | Reptile |
| Yellow ground squirrel | Mammal |
| Yellowhammer | Bird |
| Yellowhead jawfish | Fish |
| Yellowjacket | Insect |
| Yellow-legged gull | Bird |
| Yellow mongoose | Mammal |
| Yellow perch | Fish |
| Yellow sac spider | Arachnid |
| Yellow-spotted night lizard | Reptile |
| Yellow tang | Fish |
| Yellow-throated marten | Mammal |
| Yellow-throated warbler | Bird |
| Yellow warbler | Bird |
| Yellow-winged bat | Mammal |
| Yellowtail amberjack | Fish |
| Yellowtail barracuda | Fish |
| Yellowtail rockfish | Fish |
| Yellowtail snapper | Fish |
| Yeti crab | Crustacean |
| Yucatan jay | Bird |
| Yucatan squirrel | Mammal |
| Yucatan woodpecker | Bird |
| Yucca moth | Insect |
| Yunnan fire-bellied newt | Amphibian |
| Yunnan hare | Mammal |
| Yunnan snub-nosed monkey | Mammal |
| Yucatan banded gecko | Reptile |
| Yellowish cuckoo bumblebee | Insect |
| Yellow-throated toucan | Bird |
This is a representative living-animal list. It does not attempt to include every species whose name begins with yellow, Yucatan, Yunnan, or another Y modifier.
Domestic breeds and extinct animals are handled separately, so the quick list remains focused on living wildlife.
Mammals That Start With Y
Mammals beginning with Y include high-altitude cattle relatives, hares, marmots, mongooses, wallabies, bats, martens, squirrels, and primates.
Yak
The yak is one of the most important animals associated with the high mountains and plateaus of Central Asia.
A distinction between wild and domestic forms makes the biology clearer.
The wild yak, generally called Bos mutus, survives primarily across the Qinghai-Tibetan Plateau and neighboring highlands.
The domestic yak, Bos grunniens, has lived alongside pastoral communities for thousands of years and provides milk, meat, fiber, hides, fuel from dried dung, transport, and other resources.
Modern genomic research estimates that roughly 15,000 wild yaks remain, while domestic yaks number in the millions.
Yarkand Hare
The Yarkand hare (Lepus yarkandensis) is a hare native to the Tarim Basin region of Xinjiang in western China.
Like other hares, it belongs to the family Leporidae.
Hares differ from many rabbits because their young are generally born more developed, with fur and open eyes, and adults tend to rely less heavily on permanent burrow systems.
The restricted geographic range of the Yarkand hare makes it a useful example of endemism, where a species exists naturally within a relatively limited region.
Yellow-Bellied Marmot
The yellow-bellied marmot (Marmota flaviventris) is a large ground squirrel of western North America.
Yellowstone National Park reports adults around 20 to 28 inches long and 3.5 to 11 pounds.
They inhabit open grassy areas near rocky slopes, talus, and alpine or subalpine meadows.
Rocks provide lookout points and shelter, while nearby vegetation supplies food.
Yellow Mongoose
The yellow mongoose (Cynictis penicillata) is a small carnivoran native to southern Africa.
It favors open and relatively dry habitats such as grassland, scrub, and semi-arid country rather than dense rainforest.
Adults average around 600 grams, although size and coat coloration vary geographically.
The species is mainly active during daylight.
Its diet is strongly insect-based but can also include rodents, birds, reptiles, amphibians, eggs, seeds, and carrion.
Yellow-Footed Rock-Wallaby
The yellow-footed rock-wallaby (Petrogale xanthopus) is an Australian marsupial associated with cliffs, rocky outcrops, boulder fields, gorges, and steep slopes.
Its name comes from the rich yellow to orange coloration of the limbs and feet.
Adults can reach around 65 centimeters in body length.
Yellow-Winged Bat
The yellow-winged bat (Lavia frons) is an African bat with distinctive yellow-orange wings and ears.
It occurs mainly in savannas and open woodland, often near rivers, wetlands, or lakes.
Adults generally weigh about 28 to 36 grams.
Despite belonging to a family sometimes called false vampire bats, the yellow-winged bat does not specialize in blood.
It is an insect predator.
Yunnan Snub-Nosed Monkey
The Yunnan snub-nosed monkey, also called the black-and-white snub-nosed monkey, is a high-elevation primate of southwestern China.
It lives in cold mountain forests at elevations unusual for monkeys.
Dense fur protects the animal against low temperatures, while its social groups can be large.
Lichens form an important part of the diet, especially where winter conditions reduce the availability of other plant foods.
Its mountain specialization creates strong relationships among forest structure, elevation, climate, food availability, and habitat connectivity.
Birds That Start With Y
Birds account for many established Y names because yellow coloration appears frequently in bird common names.
Yellow-Eyed Penguin
The yellow-eyed penguin, or hoiho (Megadyptes antipodes), occurs naturally only in New Zealand.
The pale yellow eye and yellow band of feathers around the head give the species its English common name.
New Zealand’s Department of Conservation describes it as one of the world’s rarest penguins.
Hoiho are relatively solitary nesters compared with penguins that form enormous dense breeding colonies.
Pairs often seek sites with visual separation from neighboring nests.
Yellow-Bellied Sapsucker
The yellow-bellied sapsucker is a North American woodpecker whose feeding behavior creates an unusual ecological resource.
It drills carefully arranged rows of holes called sap wells.
Early in the season, birds can drill into xylem tissue. Later, they create shallower wells that tap sugar-rich phloem sap.
Yellow-Crowned Night Heron
The yellow-crowned night heron (Nyctanassa violacea) inhabits wetlands, coastal marshes, mangroves, tidal creeks, and some inland waterways.
Crabs and crayfish are particularly important prey.
Cornell Lab notes that the birds forage during both daylight and darkness, with tidal cycles often determining feeding schedules in coastal habitats.
Their thick bills are well suited to handling hard-bodied crustaceans.
Yellowhammer
The yellowhammer (Emberiza citrinella) is a Eurasian bunting.
Adult males are especially recognizable through bright yellow coloration around the head and underparts.
Seeds make up a large part of the adult diet, while insects become particularly important when chicks are being raised because growing young require protein-rich food.
Farmland structure, hedgerows, seed availability, and agricultural management can therefore strongly influence local populations.
Yellow Warbler
The familiar yellow warbler has undergone an important recent taxonomic change.
In 2025, ornithologists split the former Yellow Warbler into the Northern Yellow Warbler and Mangrove Yellow Warbler.
The northern species breeds widely across Canada, the United States, and parts of Mexico and migrates south for the nonbreeding season.
The mangrove form is largely resident in tropical and subtropical coastal mangrove habitats.
This is a strong example of why current taxonomy matters within an alphabetical animal guide.
Yellow-Throated Warbler
The yellow-throated warbler is a forest songbird of southeastern North America.
Its bright yellow throat gives the species its name.
Unlike many warblers that forage mainly from leaves, it frequently searches along bark, limbs, and clusters of pine needles for insects.
This feeding behavior illustrates how related bird species can divide forest habitat into different foraging niches.
Reptiles and Amphibians That Start With Y
Y reptiles include snakes, tortoises, turtles, and geckos, while amphibian names often come from yellow coloration or Asian geographic modifiers.
Yellow Anaconda
The yellow anaconda (Eunectes notaeus) is a large South American boa.
It belongs to the same genus as the green anaconda.
Yellow anacondas occupy wetlands, marshes, swamps, and slow-moving waterways, particularly within the Paraguay and Paraná drainage systems.
Their eyes and nostrils sit high on the head, which allows an animal to watch and breathe while much of its body remains submerged.
The muscular body powers constriction after prey has been seized.
Yellow-Bellied Sea Snake
The yellow-bellied sea snake is one of the most specialized marine snakes.
The Australian Museum describes it as both the most widely ranging snake in the world and the most aquatic, capable of spending its entire pelagic life without needing to crawl onto land or the seafloor.
Adults average around 1 meter long, while the tail is flattened into a paddle for swimming.
Yellow-Footed Tortoise
The yellow-footed tortoise (Chelonoidis denticulatus) is a South American forest tortoise.
Yellow or orange scales occur on the limbs and head.
Unlike tortoises associated primarily with extremely dry desert environments, yellow-footed tortoises live in humid tropical and subtropical habitats.
Fruit forms an important part of the diet alongside leaves, fungi, flowers, and other available foods.
Yunnan Fire-Bellied Newt
The name Yunnan fire-bellied newt is associated with Chinese salamanders historically occurring in Yunnan.
The common name reflects bright warning coloration on the underside.
Fire-bellied newts can use conspicuous ventral colors as an aposematic signal, advertising chemical defenses to predators.
This connects coloration directly with survival rather than treating color as a decorative trait.
Fish and Other Aquatic Animals That Start With Y
Fish provide one of the richest sections for Y because yellow coloration frequently appears in established marine and freshwater common names.
Yellowfin Tuna
The yellowfin tuna (Thunnus albacares) is a large, fast-moving ocean fish of tropical and subtropical waters.
Its long second dorsal and anal fins become bright yellow, as do the small finlets near the tail.
NOAA Fisheries reports that yellowfin tuna can reach approximately 400 pounds and grow quickly despite a lifespan of only about seven years.
Most begin reproducing at around two or three years of age.
Yellow Perch
The yellow perch (Perca flavescens) is a freshwater fish native to North America.
Adults are usually yellow to gold with six to eight dark vertical bars.
The U.S. Fish and Wildlife Service gives a common adult length of around 7.5 inches, while the longest reported animals approach 19.7 inches.
Yellow perch feed on aquatic invertebrates and small fishes.
Yellowtail Snapper
The yellowtail snapper (Ocyurus chrysurus) is a western Atlantic reef fish.
Its most obvious feature is the yellow stripe running along the side toward a strongly yellow forked tail.
Adults commonly occur around reefs, while juveniles use shallow seagrass areas that provide nursery habitat.
The Florida Museum reports lengths reaching around 30 inches.
Adults feed on fishes and invertebrates and are preyed upon by sharks, barracudas, groupers, and other large predators.
Yellowtail Rockfish
The yellowtail rockfish (Sebastes flavidus) lives along the Pacific coast of North America.
NOAA reports that it can live for up to 50 years and grow beyond two feet.
One particularly useful adaptation involves the swim bladder.
Yellowtail rockfish can release gas more rapidly than many other rockfish, reducing the severe pressure injuries known as barotrauma when they move upward through the water column.
Yellow Tang
The yellow tang is a bright reef fish in the surgeonfish family.
It feeds heavily on algae, grazing reef surfaces throughout the day.
This feeding can influence algal growth and competition on coral reefs.
Like other surgeonfishes, yellow tangs possess sharp structures near the base of the tail that can be used defensively.
The name “surgeonfish” refers to these blade-like structures rather than any medical behavior.
Yellowhead Jawfish
The yellowhead jawfish is a small Caribbean reef fish that lives in self-constructed burrows.
Its body remains close to the shelter, while the head emerges to watch for food and threats.
Jawfishes are also notable for parental care.
In many species, males incubate eggs inside the mouth, periodically aerating and rearranging them until hatching.
This makes the group useful for explaining mouthbrooding as a reproductive strategy.
Insects, Spiders and Other Invertebrates That Start With Y
Y invertebrates range from familiar wasps and crayfish to endangered Hawaiian bees and deep-sea crustaceans.
Yabby
The yabby (Cherax destructor) is an Australian freshwater crayfish.
It is a crustacean rather than a lobster or insect.
The Australian Museum reports adults reaching around 20 centimeters.
Large pincers are the modified first pair of walking legs and help with feeding, defense, competition, and manipulating objects.
Yellowjacket
A yellowjacket is a wasp.
The name is applied mainly to social wasps in genera such as Vespula and Dolichovespula.
Colonies usually contain a reproductive queen and large numbers of female workers.
Workers capture other insects and animal material as protein for developing larvae, while adults also consume sugary liquids.
This makes yellowjackets both predators and consumers of floral or other carbohydrate-rich resources.
Yellow-Faced Bee
Yellow-faced bee refers to species in the genus Hylaeus.
They can resemble small wasps because they lack the dense external pollen-carrying hairs familiar from many bees.
Instead of carrying pollen in conspicuous leg baskets, females transport pollen internally.
Some Hawaiian yellow-faced bees have major conservation importance.
In 2016, seven Hawaiian Hylaeus species became federally listed as Endangered in the United States.
Those listings made Hawaiian yellow-faced bees prominent examples of endangered native pollinators.
Yellow Crazy Ant
The yellow crazy ant is an invasive ant in many tropical regions outside its native range.
The “crazy” portion of its name refers to the rapid, seemingly erratic movements of workers.
Large introduced colonies can affect native invertebrates and vertebrates, interfere with ecological relationships, and alter food webs.
This species belongs naturally in discussions about invasive animals, colony behavior, and ecosystem disruption.
Yellow Sac Spider
Yellow sac spiders are active hunting spiders.
They typically hide within silk retreats during periods of inactivity rather than building large circular prey-catching webs.
At night, they move across vegetation or structures searching for small arthropods.
Their silk is therefore used mainly for shelter, egg protection, and safety rather than as a permanent aerial prey trap.
Yeti Crab
The Yeti crab is one of the strangest animals beginning with Y.
The first described species, Kiwa hirsuta, was discovered in 2005 near a hydrothermal vent south of Easter Island.
Smithsonian notes that the species lacks functional eyes and is covered with conspicuous hair-like structures, giving it the appearance that inspired the “Yeti” name.
Its discovery was significant enough to establish both a new genus, Kiwa, and a previously unknown broader crustacean lineage.
Yucca Moth
Yucca moths have one of the classic mutualistic relationships in ecology.
Female moths deliberately collect pollen from yucca flowers and transfer it to another flower.
They then lay eggs within the flower.
The developing larvae eat some of the resulting seeds, while enough seeds usually remain for the plant to reproduce.
The yucca gains reliable pollination and the moth gains a food source for its offspring.
This is a strong example of coevolution, where two lineages have developed unusually close biological dependence.
Which Animals That Start With Y Are Endangered or Threatened?
Several Y animals face serious conservation pressure, although broad color-based names can cover species with very different statuses.
The yellow-eyed penguin is among the strongest examples. Its northern breeding population fell to only 143 known nests in 2024/25, an 80% decline from 2008/09. New Zealand classifies the species as Threatened–Nationally Endangered.
Several Hawaiian yellow-faced bees are federally Endangered in the United States. Seven species received protection together in 2016.
The wild yak also warrants separate treatment from the domestic yak. Wild animals number only around 15,000 according to modern genomic literature, while domestic yaks remain extremely numerous.
The yellow-footed rock-wallaby has declined across portions of its Australian range and has naturally fragmented populations associated with isolated rocky habitats.
Several Yunnan and Yucatan endemic animals also face habitat pressures because narrow geographic distributions can increase vulnerability to forest loss or environmental change.
The important point is that the word yellow itself tells us nothing about extinction risk. Conservation status belongs to a specific species or population.
What Are Some Easy Animals That Start With Y for Kids?
Some of the easiest Y animals for alphabet activities are yabby, yak, yellow-eyed penguin, yellowfin tuna, yellowhammer, yellowjacket, yellow mongoose, yellow perch, and Yeti crab.
They also introduce several major animal groups.
Yak and yellow mongoose are mammals. Yellow-eyed penguin and yellowhammer are birds. Yellowfin tuna and yellow perch are fish. Yellowjacket is an insect, while yabby and Yeti crab are crustaceans.
A more advanced list can add yellow-bellied sea snake, yellow-footed rock-wallaby, yellow-faced bee, Yarkand hare, Yucatan jay, and Yunnan snub-nosed monkey.
Domestic Animal Breeds That Start With Y
Several domestic animal breeds begin with Y.
Yorkshire Terrier
The Yorkshire Terrier is a small domestic dog breed developed in England.
It belongs biologically to the domestic dog species despite its distinctive size, coat, and breed history.
Yakutian Laika
The Yakutian Laika is a northern domestic dog breed associated with the Sakha region of Siberia.
It has historically been used for sled work, hunting, and companionship.
Its dense coat reflects the cold environments in which the breed developed.
Yokohama Chicken
The Yokohama chicken is an ornamental domestic chicken breed famous for the exceptionally long tail feathers of males.
It remains a breed of domestic chicken rather than a separate wild bird species.
Yorkiepoo and Other Designer Names
Names such as Yorkiepoo describe domestic crossbreeds rather than wildlife species.
Including every designer-dog name can inflate an alphabetical list quickly, so these are better separated from the wildlife inventory.
Frequently Asked Questions About Animals That Start With Y
What animal starts with the letter Y?
Examples include the yabby, yak, yellow-eyed penguin, yellowfin tuna, yellowhammer, yellowjacket, yellow mongoose, and Yeti crab.
What are 10 animals that start with Y?
Ten useful examples are yabby, yak, Yarkand hare, yellow anaconda, yellow-eyed penguin, yellowfin tuna, yellow-footed rock-wallaby, yellow mongoose, yellow perch, and Yeti crab.
What is a rare animal that starts with Y?
The yellow-eyed penguin is one of the strongest examples because its northern breeding population has undergone a severe long-term decline.
Final Thoughts on Animals That Start With Y
Animals that start with Y are much more diverse than the short basic vocabulary of yak, yabby, yellowhammer, and yellowjacket might suggest.
The letter connects high Himalayan and Tibetan landscapes with Australian freshwater systems, New Zealand penguin colonies, African savannas, American forests, coral reefs, and deep-sea hydrothermal vents.
Classification adds important context.
Yabbies and Yeti crabs are crustaceans. Yellowjackets are wasps. Yellow-bellied sea snakes are fully marine reptiles. Yellowtail snapper and yellowtail rockfish belong to separate fish lineages, while the familiar Yellow Warbler name changed taxonomically in 2025.
The adaptations are equally varied.
Yaks possess respiratory and cardiovascular features that support life in thin mountain air. Yellow-footed rock-wallabies use powerful hind legs and long tails on steep rock. Yellow-bellied sea snakes propel themselves with flattened tails, while yabbies survive drought by retreating into deep burrows.
Several Y animals also illustrate broader ecological relationships.
Yellow-bellied sapsuckers create sap wells used by other wildlife. Yucca moths pollinate the plants on which their offspring depend. Yeti crabs participate in deep-sea food webs powered by chemosynthetic microbes rather than sunlight.
Readers following the animal alphabet can return naturally to Animals That Start With X or continue with Animals That Start With Z.
