1. White-tailed jackrabbit
   African lion
2. Canada goose
   Ibex

White-tailed jackrabbits (Lepus californicus) are important sources of prey for coyotes, golden eagles and bobcats of western North America. Large populations of the jackrabbit help sustain the region's ecological order.

1. Scarlet macaw
   Red-tailed wambenger
2. Manatee
   Paradoxure

Native to southwestern Australia, the red-tailed wambenger (Phascogale calura) is endangered and has been bred in captivity since 2001. The males of the species breed once every year.

1. Caracal
   Honey badger
2. Dingo
   White-cheeked pintail

The sedentary lifestyle of the white-cheeked pintail (Anas bahamensis bahamensis) in regions that border the tropics as well as prolonged breeding seasons greatly influence the animal's mating habits. A disruption of these factors may have caused one pintail to venture as far as Florida in 1996.

1. Swallow-tailed gull
   Field flicker
2. Reindeer
   Steenbok

The nocturnal swallow-tailed gull (Creagrus furcatus) is a seabird native to the Galapagos Islands. The gull mainly feeds on clupeid fish and squid that skim the ocean's surface at night.

1. Topi
   Warthog
2. Spotted-tailed quoll
   Tiger cat

Spotted-tailed quoll (Dasyurus maculatus) is a sizeable breed of the quoll species, weighing up to 15 pounds. Reptiles, birds, mammals and insects comprise the diet of the spotted-tailed quoll.

1. Blue fox
   Long-tailed skua
2. Argalis
   Coke's hartebeest

The long-tailed skua (Stercorarius longicausus) thrives on land prey during the summer months and ocean resources during the remaining months. The animal breeds in the Arctic during the summer, but if food is scarce there it will migrate out of its breeding zone which reduces its breeding chances.

1. Eastern quoll
   Coqui francolin
2. Ringtail possum
   Gemsbok

Australia's ringtail possum exhibits a heightened chemical response to the fecal scents of its predators by fleeing quicker than when it's exposed to neutral odors. The ringtail possum will avoid the fecal smell without need of seeing the actual predators.

1. Gray rhea
   Lily trotter
2. Ringtail Raccoon
   Bohor reedbuck

The smallest member of the raccoon species is the ringtail (Bassariscus astutus). The nocturnal creature can be found almost al.

1. Ring-tailed lemur
   Gray heron
2. Common genet
   Blesok

Compared to other lemurs, ring-tailed lemurs tend to exhibit more developed social skills, and they possess complex communication abilities. The physical prowess of the ring-tail lemur equals that of other lemurs, however.

1. Little grebe
   Civet cat
2. Ring-tailed coatimundi
   Wapiti elk

The carnivorous ring-tailed coatimundi inhabits large forested areas of South America. The creature has evolved to socialize well with humans in light of increased rates of deforestation and heightened encroachment of human populations into the animal's ecological zone.

1. Common eland
   European badger
2. Arctic fox
   Aardwolf

Aardwolves inhabit the south and east-central dry grassland areas of Africa. During the warmest months, the creature thrives on Trinervitermes trinervoides in South Africa. During cold months, when the termites stay underground aardwolves eat Hodotermes mossambicus, a less available termite species.

1. Guerza
   Huron
2. Chacma baboon
   Hyrax

Chacma baboons (Papio ursinus) form social bonds through female-led groups. Combative males of the species establish hierarchies within the group based on dominance. Male chacma baboons are also highly aggressive toward females of the species.

1. African jacana
   Kongoni
2. Spectacled caiman
   Komodo dragon

The female spectacled caiman (Caiman crocodilus) typically tends to its nest over the entire incubation period many meters away from water bodies without feeding. Humans, capuchin monkeys and jaguars are primary predators of spectacled caiman eggs.

1. Red-breasted nuthatch
   Mule deer
2. Red phalarope
   Sambar

Mule deer have a leaping pronk that sets them apart from other deer types. Mule deer are most prevalent in western U.S. states. Several types of mule deer in California include Rocky Mountain mule deer, Southern mule deer, Burro mule deer and Inyo mule deer.

1. Palm squirrel
   Red brocket
2. Eastern cottontail rabbit
   Sloth bear

The Eastern cottontail rabbit (Sylvilagus floridamus) typically shares urban spaces with humans, which has caused disruptions in the animal's food supply due to destruction of vegetation. Specifically, herbivorous Eastern cottontail rabbits occupy brushlands and fields that border expanding cities.

1. Fat-tailed dunnart
   Emu
2. Feathertail glider
   European shelduck

Nocturnal fat-tailed dunnarts (Sminthopsis crassicaudata) inhabit open grasslands of southern and central Australia. The animals will travel up to 400 meters a day to forage invertebrates under rocks or logs.

1. Galah
   Mexican wolf
2. Gaur
   Mule deer

The endangered gaur resembles an ox and is native to Southeast Asia and India. In 2000, scientists at a biotechnology firm in Massachusetts reported that they cloned an Asian gaur and incubated the fetus in a cow in Iowa.

1. Mudskipper
   Hanuman langur
2. Numbat
   Grey phalarope

Native to India, the Hanuman langur is an omnivorous diurnal primate. It was believed that there was only one species of Hanuman langur, but there are three: Semnopithecus entellus, S. priam and S. hypoleucos.

1. Ibex
   Great skua
2. Gray duiker
   Cougar

The ibex inhabits mountainous regions of Europe, Asia and northeast Africa. Throughout the day as the sun's radiation increases, the ibex tends to move to higher elevations where they spend less time feeding.

1. Chestnut weaver
   Glossy ibis
2. Chimpanzee
   Jaguarundi

Native to Central and South America, jaguarundis (Puma yagouaroundi) are classified as wild felids. The small carnivorous cats are endangered due to human hunting and loss of habitat.

1. Brindled gnu
   Common genet
2. Kinkajou
   Tokay gecko

In 2005, New York socialite Paris Hilton purchased a pet kinkajou and named the five-pound carnivorous creature "Baby Luv." Kinkajous have sharp teeth and thrive in rainforest habitats.

1. Great cormorant
   Sage grouse
2. Least chipmunk
   Groundhog

In 2004, scientists identified the unique seed preparation technique of the least chipmunk (Neotamias minimus). To protect its seed cache, the animal prepares a "bolus," which is a saliva-coated cluster of seeds that it has hulled.

1. Nilgai
   Oribi
2. Greater kudu
   Meerkat

At the Living Desert Zoo in Palm Desert, California in 2003, zookeepers intentionally left a sickly meerkat with other meerkats in captivity instead of transferring the ailing animal to a hospital. Zoo officials claimed they did so because the southern African creatures are highly sociable.

1. Musk ox
   Llama
2. Nine-banded armadillo
   Defassa waterbuck

The nine-banded armadillo (Dasypus novemcinctus) is native to Paraguay, where the animal is an important source of protein for humans. Aside from human hunting, cold and drought also affect the species ecologically.

1. Cuis
   Ocelot
2. Dromedary camel
   Brazilian tapir

Environmentalists had long protested the existence of liquefied natural gas plants that lined the Brownsville Ship Channel at the U.S.-Mexico border. Experts insisted that the plants prevented the endangered U.S. ocelot population from breeding with Mexico's large ocelot population.

1. Bobcat
   Striated heron
2. Pampas fox
   Potoroo

The Pampas fox (Lycalopex gymnocercus) is a versatile feeder that can change its habits based on food availability. The South American Pampas fox is chiefly a carnivorous animal, but it can thrive off of woodland fruits for extended periods.

1. Red brocket
   Common raccoon
2. Striped skunk
   Suricate

Native to North America, the common raccoon (Procyon lotor) has spread across Europe in recent years due to escaped pets and species introductions. New populations of the raccoon in Europe threaten both humans and other animals since raccoons are carriers of highly contagious disease.

1. Swamp deer
   Urial
2. Giant sable antelope
   Vicuna

These days the critically endangered giant sable antelope (Hippotragus niger variani) is confined to a small area of central Angola. Populations of the African beast have suffered tremendous declines in recent years.

1. Stone sheep
   Sage hen
2. Southern tamandua
   Margay

Southern tamanduas are anteaters that inhabit the area that spans from Uruguay to southern Mexico. Unlike the land-dwelling giant anteater, the southern tamandua spends a good portion of its time in trees.

1. Impala
   Brown lemur
2. Vicuna
   Indian tree pie

South American vicuna (Vicugna vicugna) and other camelids provide poor herders of Bolivia and Peru fuel, fiber and meat. Populations of vicuna have dwindled in recent years due to increased commercialization of the animal's fiber.

1. Lily trotter
   American racer
2. Roan antelope
   Common warthog

The common warthog (Phacochoerus africanus) is a wild pig that's widely spread across the African continent, except in tropical forests and dry lands. The beast is the preferred host of Ornithodoros ticks; both species are known to sustain and transmit African swine fever.

1. Puma
   Yak
2. Serval
   Tayra

Bos mutus is the wild yak that roams the alpine meadows and steppes of Tibet's mountainous terrain. Bos grunniens is the domesticated form of the species that's often sustained in Central Asian countries.

1. Swam deer
   Topi
2. African buffalo
   Gila monster

African buffalo (Syncerus caffer) graze across nearly all of sub-Saharan Africa except the driest areas. The animal is one of the most sought after creatures in the African tourism industry.

1. Gemsbok
   King vulture
2. Gray langur
   Ground legaan

Native to the African savannah, gemsbok (Oryx gazella gazella) are large in size but they prefer to eat grass, which comprises over 85 percent of their diet. The animals also feed on a type of cucumber dubbed "gemsbok cucumber," or Acanthosicyos naudinianus.

1. Pied avocet
   Red sheep
2. Caracal
   Pine siskin

Caracal (Felis caracal) range in weight from 30 to 40 pounds and are native to the mountain ranges of Asia and Africa. The animal's name is derived from the Turkish "karakal," meaning "black ear."

1. Onager
   Common mynah
2. Plains zebra
   Fisher

By 1930, populations of fisher (Martes pennanti) were wiped out completely in Montana. The medium-sized creatures currently spread throughout the Western United States at low to mid-elevations zones in coniferous forest areas.

1. Rainbow lory
   Southern screamer
2. Gerenuk
   Little grebe

Desert-dwelling gerenuk (Litrocranius walleri) are also called giraffe-necked antelope. The creature feeds on buds and leaves located on trees and tall bushes. When in extreme distress, gerenuk emit a loud bleat sound.

1. Campo flicker
   Dingo
2. Hippopotamus
   African darter

Due to declining populations, the semi-aquatic common hippopotamus now dwells in confined protected regions of southern, western and eastern Africa. Humans hunt the animal for its meat and ivory, as well as for sport.

1. Impala
   Crimson-breasted shrike
2. Caribou
   African skink

Impala (Aepyceros melampus) are territorial grazers and will remain in one area for extended periods of time. Herds of impala will hover near the same dung site during this portion of time.

1. Banded mongoose
   Leopard
2. African lion
   Mocking cliffchat

The endangered leopard (Panthera pardus) has evolved to survive many diverse climates. It is the most widely distributed of all wild felids. The animal roams the African savannah, the muggy rainforests of Southeast Asia and the mild forests of China and Russia.