During anthropogenous pressure on nature number and variety of most part of large “noble” predators (felines, bears, canines etc.) had strongly decreased, and some species had completely disappeared. Populations of predators were so strongly undermined by human activity, that the most part of carnivores species had not gone through ecological crisis at the boundary of Holocene and Neocene, and had simply died out during several hundreds of thousand years when on Earth unproductive ecosystems had expressed. But completely new opportunities had been received by species which had successfully coexisted humans. In Northern America such species was coyote (Canis latrans) which had widely settled at the continent due to extermination of wolf and woods slash. This species had reached prosperity in Northern America, having evolved to some new species of predators.

One of descendants of coyote inhabits plains overgrown with grasses in the central part of the continent, stretched like wide strip along Rocky mountains from the north to the south. This animal is externally similar not to coyote, and not to the representative of canine family at all, and more to someone of felines. This similarity is reflected in the name of an animal: derivative of words Lupus (Latin “wolf”) and “-pardus” – the ending of names of some felines.

This species is specialized in catching of swift-footed medium-sized catch that had resulted in formation of running predator of the special appearance. A constitution of lupardus is rather light: animal has muscled sinewy body, thin long legs and flexible backbone. Claws at lupardus are short, but thick and sharp: they improve coupling with ground at run. By appearance it resembles other swift-footed predatory animals of Neocene: African pardinia and Middle-Asian zibetonyx (both animals are representatives of civet family). Losing to other predators in physical strength, lupardus surpasses them in speed: it is the fastest animal of the American continent, accelerating momentum up to 90 kms per hour at the short distance. During chasing of swift-footed catch it is practically out of competition.

At the lupardus there is small head with short muzzle. Jaws of the animal are rather short, but strong, with moderately long canines. Eyes are directed forward and provide good three-dimensional sight. The nasal cavity is short, but wide, and mucous membrane forms inside it numerous plicas. It considerably aggravates sense of smell of predator.

During intensive muscular work the animal is exposed to serious danger of overheat. The lupardus partly escapes from it due to fragile constitution, but it has also extra for cooling – very wide ears similar to ears of some desert foxes. When the lupardus chases catch, blood vessels penetrating ears, dilate, and excessive heat dissipates. Big auricles provide to the lupardus good hearing, that is especially important at hunting for small catch in high grass, where the visibility is bad.

Skin of the lupardus is colored light rusty with thin close black cross strips. This colouring resembles a little “tiger-like” colour of some breeds of domestic dogs. Legs of lupardus are dark; strips are not expressed on them. Internal side of wide ears is grey, but on external side of ear there is the big white spot edged with black wool. When lupardus is turned by muzzle directly to catch, its prey does not see the predator on the background of grass, but congeners standing behind perfectly notice white spots on its ears.

The basic catch of luparduses is deermara – the running rodent of South-American origin similar to small antelope. Except for them these predators hunt large flightless ostrich turkeys. Less often luparduses attack larger animals of American plains: donkeyhorses and young peccasons. At lack of large prey lupardus eats small animals: rodents, lizards and snakes. Usually it avoids to hunt among bushes or in high grass, preferring plains where grass is short because numerous herbivores eat and tramble it. Tracking down its catch, lupardus relies first of all on sharp sight; therefore for it the good field of view is important. Besides the high grass complicates run, and animal simply may fall, having hooked for stalks and having injured its legs. Having caught up prey, luparduses put to it strong bites in sides and hips, trying to pull out a piece of meat. With each such wound animal weakens more and more, and soon it falls, becoming catch of predators.

Swift-footed animals have one general feature: they get tired very quickly, and can not accelerate the maximal speed for a long time. Lupardus has the same feature, but it easily compensates such lack by other features of behaviour. As against cats and pardinias, and similarly to zibetonyx, it is packing hunter. Luparduses lead the chasing of catch by organized way, and in pack always there are animals, ready to join chasing. The pack of luparduses cuts the selected catch from the common herd, and drives it up to exhaustion. Thus hunting animals arrange ambushes, lining up. Herbivores cut from herd are “transferred” by hunters from one to another. In this case the prey is every time chased by all new animals, and by the end of chasing it is literally ready to fall down of tiredness.

Such hunting tactics can not be organized without close interaction between members of clan. Outside of hunting lupardus is the sociable family animal closely communicating with congeners. Similarly to other canids, lupardus uses for communication a tail with a white tip. By position of tail and ears animal expresses emotion and shows the mood. The clan is ruled by main pair in which the male is mainer than the female. Dominant male rules all males in clan and all females submit to the main female. Youngest animals are outside of the common hierarchy: the relation to cubs at luparduses is the most gentle and touching. Each female twice per one year brings posterity: up to three – four clumsy long-legged puppies. They differ from adult animals in black colouring, and it forces even dominants to suffer all their children's pranks.

The grown up animals also outside of hierarchy, but for other reason: they are driven off by adult animals, and young, but not developed to the full, animals lead hard life, eating scraps. Gradually they study to hunt. It occurs during the big hunting for large prey. In the beginning young animals are on supporting parts, and then most capable of them quickly rise on a scale of ranks up to the high position. And once any young strong lupardus will overthrow the leader, proving its own hunting abilities.