Greater Malayan Chevrotain
Greater Malayan chevrotains are the smallest living hooved animals and are known as “living fossils” because they’ve changed little in 30 million years. They’re also commonly referred to as “mouse deer.” When standing on all four legs, the chevrotain’s hind end is actually higher than its front quarter. They live in the undergrowth of lowland […]
Pygmy Slow Loris
Pygmy slow lorises can be easily identified by their extremely-large brown eyes, which help them spot prey in the dark. They are the only venomous primate — glands inside their elbows secrete compounds that mix with their saliva to deliver a toxic bite to rivals and predators. Unfortunately, pygmy slow lorises sold as exotic pets […]
De Brazza’s Monkey
De Brazza’s monkeys are arboreal (live in trees). They choose habitats near water and are good swimmers. To protect themselves while foraging on the forest floor, De Brazza’s monkeys store food in their large cheek pouches to eat later when they are in a safe place. They are important seed dispersers in their habitat.
Caribou and reindeer are actually the same species, known as “reindeer” in Europe and as “caribou” in North America. “Reindeer” typically refers to domesticated individuals, even in North America. Both male and female caribou have antlers, and in comparison to body size, they’re the largest and heaviest antlers of all living deer species. They dig […]
Prevost’s squirrels play an important ecological role in their forest habitat. They eat an assortment of seasonal fruits and disperse undigested seeds in their waste as they travel through the forest. The seeds sprout away from the parent plant and increase the survival of fruiting plant species. Like all rodents, their teeth never stop growing! […]
Both male and female scimitar-horned oryx have long, ridged, sharp-tipped and curved backward horns that grow to be several feet long. Their white coat helps reflect the heat of the desert, and their black skin and tip of the tongue protects against sunburn while enlarged hooves enable the oryx to walk easily on sand.
Red-ruffed lemurs are the world’s largest lemurs, living in female-dominated family groups of 2 to 16 animals. Red-ruffed lemurs are arboreal (live in trees) and very rarely descend to the ground. They are active during the day and spend most of their waking hours socializing and eating. They are critically endangered due to deforestation, hunting […]
Yaks have small ears and a wide forehead, with smooth horns that are generally dark in color. Colors can vary between yaks; some can be white, grey or brown. Both males and females have long, shaggy hair with a dense, wooly undercoat over the chest, flanks and thighs to insulate them from the cold.
The cat’s huge paws have fur on the bottom that gives the leopard traction on the snow and protection from sharp rocks. The snow leopard’s long, thick, and luxurious tail acts as a built-in comforter when the cat wraps it around its body for added warmth. The tail is almost as long as its body!
Gazelles are extremely alert to sounds and movements, relying on visual awareness of one another to stay in contact. Their strong sense of hearing, sight, and smell balance its vulnerability and small size on the open plains.
Nigerian Dwarf Goat
Previously thought to be pygmy goats, they are known for their small stature. Nigerian dwarf goats are ruminants, which means they chew cud regurgitated from the first stomach. In total, goats have four stomachs, just like a cow! On average, a doe Nigerian dwarf goat produces a half gallon of milk each day.
The kunekune breed (pronounced “cooney” “cooney”) first arrived in the United States in the 1990s. You’ll notice little tassels on their chin, which is just longer hair — a distinctive trait for this pig. They are also friendly and loving toward people.
American Guinea Hog
Despite their name, American Guinea hogs are native to the United States. After seeing their population decline throughout the early part of the twentieth century, American Guinea hog populations have increased in recent decades, as many new herds have been established throughout small farms. Pigs are curious and intelligent animals, and our Guinea hog receives […]
Prehensile-tailed porcupines are arboreal animals, spending most of their time in trees. These porcupines are also nocturnal, and are known to move to a new tree each day. The species is named after their prehensile tails, which they use for grasping and hanging in trees.
North American Porcupine
The porcupine’s most famous feature—the quill—is hollow, 2 to 3 inches (5 to 7 centimeters) in length, and lightly attached to the porcupine’s skin. Porcupines are covered in about 30,000 quills.
Harbor seals can dive to depths of 500 feet (152.4 meters) but depths of up to 1,460 feet (446 meters) have been recorded. They can remain submerged for up to 30 minutes at a time. During the winter, the blubber layer can account for up to 30 percent of a harbor seal’s body mass.
North American Elk
Elk are the most vocal deer in North America. The calves bleat, the females squeal or utter sharp barks, and the males bugle when in rut (mating season). Bugling is used to attract mates and advertise territories during the fall rutting season and can be heard for long distances.
Southern Three-banded Armadillo
The only armadillos that can completely enclose themselves in their own shell by rolling into a ball. When threatened, they roll up into ball, leaving only a small opening between the shell edges. If the animal is prodded through the opening, it quickly snaps fully shut like a steel trap.
Straw-colored Fruit Bat
Their wingspan is 30-36 inches. Their wings are long and narrow, allowing them to fly long distances and not expend too much energy by flapping them a lot.
Fighting is very rare in the dwarf mongoose society. Sub-adults commonly care for the young while the adults go foraging for food. When members of the pack are apart, they keep in constant contact with a series of twitters and whistles.
Giraffes only need 5 to 30 minutes of sleep in a 24-hour period! They often achieve that in quick naps that may last only a minute or two at a time. Giraffes can rest while standing, but they sometimes also lie down with their head resting on their rump. That’s a vulnerable position for a […]
North American River Otter
Though they live on land, they are well adapted for life in rivers and streams. Built for swimming, river otters have a streamlined body, short legs with webbed feet, dense fur that keeps them warm, a tapered tail, and small ears and nostrils that can close underwater.
Hoffmann’s Two-toed Sloth
Almost entirely arboreal (tree-dwelling) creatures, two-toed sloths live high in the forest canopy of tropical rainforests. They can be found resting in the crowns of trees or the lianas (woody climbing vines) that are interwoven throughout the canopy treetops.
Their long-stranded hair seems to be waterproofed by skin glands as an adaptation to their frequent and lengthy stays in the water. It is generously covered with thin brownish, tar-like grease that has a distinct, turpentine-like odor.
Spotted hyenas are extremely vocal animals. The well-known laughing sound is emitted by an animal that is being chased or attacked. A variety of whoops are made when the pack is getting ready for the hunt.
In proportion to its body, the serval has the longest legs in the cat family, enabling it to peer over tall vegetation to find prey. A serval can leap twice its own body length. A pounce may span 3-12 feet and may be over 3 feet high.
Red River Hog
Red river hogs do not live in a red river! Instead, they are named for their reddish brown fur and the fact that they often wade through water. They are the smallest of the African pigs, weighing up to 250 pounds on average, and are found primarily in the rainforests and adjacent savannas of Africa.
Greater Kudu are the second tallest antelope (eland are tallest). Male greater Kudu have horns that are nearly 4 feet tall with 2-1/2 inch twists. Despite their large size, kudu are accomplished jumpers, with records of heights of over 8.25 feet being cleared with ease.
Baird’s tapir are the largest indigenous mammal in Central America and are well known for their elongated, flexible upper lip that is extended into a proboscis, resembling a shorter version of an elephant’s trunk.
Badgers are fearless, feisty, solitary, nocturnal animals that spend much of their life underground. They are extremely fast, efficient diggers. They hunt underground and surprise their prey by digging directly into their burrows.
Bactrian camels can go without water for months at a time, but when water is available, they may drink up to 15 gallons of water at once. Long eyelashes and ears lined with hair provide protection from blowing sand.
“Jaguar” comes from the native Indian name ‘yaguara,’ meaning ‘a beast that kills its prey with one bound.’ Jaguars are often found near water. They are good swimmers and frequently hunt near bodies of water.
“Hippopotamus” comes from a Greek word meaning “river horse.” Hippos are not related to horses. Their closest living relative is the whale. An adult hippo can hold its breath underwater for up to 5 minutes!
“Cheetah” comes from a Hindi word meaning “spotted one.” The cheetah has a leaner body and longer legs than other big cats. The black “teardrops” under each eye may enhance their vision by reducing glare from the sun.
Lions are the only cats that live in large, social groups, called “prides.” A pride is made up of 3 to 30 lions. The pride consists of lionesses (mothers, sisters, and cousins), and their cubs, along with a few unrelated adult males.
Amur tigers have the palest orange coats and fewest stripes of all tiger subspecies. No two tigers have the same pattern of stripes. Face markings can be used like human fingerprints for identification. Unlike many other cat species, tigers readily enter water and are good swimmers.
The elephants that live on the African savanna have a huge influence on their ecosystem. As their herds move across the savanna, they feed on trees, breaking them up, often by pulling them up by the roots and crushing them. Without this tree clearing, the savanna would quickly grow from grassland to woodland.
Alpacas have thick fur to keep warm in the cold winters in the Andes. Their hair is hollow and has insulative properties. The alpaca also has special stomach secretions that help it absorb 50 percent more nutrients than a sheep, allowing it to survive where there’s only poor-quality grass.
Golden Lion Tamarin
Golden lion tamarins have a unique tendency to give birth to twins. About 78 percent of all their births in the wild are twins, and the energetic demand of caring for two infants has shaped the social structure and cooperative breeding patterns prevalent in golden lion tamarins. The vibrant color of their coat is thought […]
Cotton-top tamarins spend a considerable amount of time grooming throughout the day during periods of rest (grooming is a social tool to create and maintain bonds between primates). Also, the brain of a cotton-top is proportionately larger than a human brain.
Black-handed Spider Monkey
Spider monkeys don’t have thumbs on their hands — their four elongated fingers act as a hook when moving through the trees. Their prehensile tail acts like a fifth limb and can fully support the monkey’s body for extended periods. The hairless sensory area on the underside of the tip of their tail can pick […]
Siamang are the largest of the 14 species of gibbons. They’re very acrobatic and agile, with extra-long arms that help them cover up to 10 feet in a single swing. If they’re not swinging through the trees, they’re very likely walking along branches with their arms outstretched to help them keep their balance.
Orangutans are the largest tree-dwelling animal, and their name means “person of the forest” in Malay. Orangutans and humans share 97 percent of the same genetic material. Solitary animals, they rarely encounter others of their kind in the wild unless sharing a fruiting tree or mating.
Also called snow monkeys, their fur is a unique adaptation to cold, as fur thickness increases as habitat temperature decreases. This allows the monkey to cope with winter temperatures as low as -4° F. It’s the only animal — other than humans and raccoons — that’s known to wash its food before eating it.
Western Lowland Gorilla
An adult gorilla’s upper body strength is six times more powerful than that of an adult human. Gorillas also have longer arms than legs — their arm span is actually larger than their height. Although they can stand and walk upright for short distances, they prefer to walk in a quadrupedal fashion, supporting their weight […]
Goeldi’s monkeys gallop through the forest on all fours and are able to leap distances of up to 12 feet between branches — quite spectacular for such a small monkey! While most of their time is spent in the trees, they will come down to the ground, especially when looking for insects or vertebrates. They […]
Eastern Black and White Colobus Monkey
The eastern black and white colobus monkey is the largest of the African leaf-eating monkeys. Babies are born pure white and attain their black and white coloration at about six months of age. Colobus monkeys have unusual stomachs, with three of four different regions, similar to the digestive systems of cows.
The fennec fox is the smallest of all the world’s foxes. The ears of a fennec fox can measure to be roughly 6 inches. Living in the desert, the fennec fox is able to go long periods without water.
Bonobos and chimpanzees share 98.7 percent of their DNA with humans, making them and chimpanzees the closest living relatives to humans. Bonobos are led by the females and tend to share a peaceful society. The Milwaukee County Zoo is currently home to the largest group of bonobos in North America.
The Eastern bongo is the largest and heaviest forest antelope. Both female and male Eastern bongos have spiraled, u-shaped horns that grow up to 40 inches long, which they keep their entire lives. Since they live in dense forests, the horns of Eastern bongos usually point backward, allowing them to better navigate their surroundings. One […]
The red panda is not closely related to giant pandas. Red pandas are housed in Big Cat Country because they are geographically from the same wild habitats as some of the “real” big cats. Red Pandas at the Zoo can often be seen climbing high on their habitat platforms.
Scottish Highland Cow
The highland breed is the oldest registered breed in the world. The coat of a Scottish highland cow is distinctive, with hair sometimes reaching 13 inches. Their long horns help them forage for food during the winter.
Grizzlies can run up to 30 miles an hour. A mother grizzly bear is extremely protective of her cubs. Grizzly bears congregate together during summer spawning when the salmon runs upstream.