Wolf in the context of "Fenrir"

The Lupercal (from Latin lupa "female wolf") was a cave at the southwest foot of the Palatine Hill in Rome, located somewhere between the temple of Magna Mater and the Sant'Anastasia al Palatino. In the legend of the founding of Rome, Romulus and Remus were found there by the she-wolf who suckled them until they were rescued by the shepherd Faustulus. Luperci, the priests of Faunus, celebrated certain ceremonies of the Lupercalia at the cave, from the earliest days of the City until at least 494 AD.

The History of Rome, perhaps originally titled Annales, and frequently referred to as Ab Urbe Condita (English: From the Founding of the City), is a monumental history of ancient Rome, written in Latin between 27 and 9 BC by the Roman historian Titus Livius, better known in English as "Livy". The work covers the period from the legends concerning the arrival of Aeneas and the refugees from the fall of Troy, to the city's founding in 753 BC, the expulsion of the Kings in 509 BC, and down to Livy's own time, during the reign of the emperor Augustus. The last event covered by Livy is the death of Drusus in 9 BC. 35 of 142 books, about a quarter of the work, are still extant. The surviving books deal with the events down to 293 BC (books 1–10), and from 219 to 166 BC (books 21–45).

The Big Bad Wolf is a fictional wolf appearing in several cautionary tales, including some of Grimms' Fairy Tales. Versions of this character have appeared in numerous works, and it has become a generic archetype of a menacing predatory antagonist.

A keystone species is a species that has a disproportionately large effect on its natural environment relative to its abundance. The concept was introduced in 1969 by the zoologist Robert T. Paine. Keystone species play a critical role in maintaining the structure of an ecological community, affecting many other organisms in an ecosystem and helping to determine the types and numbers of various other species in the community. Without keystone species, the ecosystem would be dramatically different or cease to exist altogether. Some keystone species, such as the wolf and lion, are also apex predators.

The role that a keystone species plays in its ecosystem is analogous to the role of a keystone in an arch. While the keystone is under the least pressure of any of the stones in an arch, the arch still collapses without it. Similarly, an ecosystem may experience a dramatic shift if a keystone species is removed, even though that species was a small part of the ecosystem by measures of biomass or productivity.It became a popular concept in conservation biology, alongside flagship and umbrella species. Although the concept is valued as a descriptor for particularly strong inter-species interactions, and has allowed easier communication between ecologists and conservation policy-makers, it has been criticized for oversimplifying complex ecological systems.

The mammoth steppe, also known as steppe-tundra, was once the Earth's most extensive biome. During glacial periods in the later Pleistocene, it stretched east to west from the Iberian Peninsula in the west of Europe, then across Eurasia and through Beringia (the region including the far northeast of Siberia, Alaska and the now submerged land between them) and into the Yukon in northwest Canada; from north to south, the steppe reached from the Arctic southward to southern Europe, Central Asia and northern China. The mammoth steppe was cold and dry, and relatively featureless—though climate, topography, and geography varied considerably throughout. Certain areas of the biome, such as coastal areas, had wetter and milder climates than others. Some areas featured rivers which through erosion naturally created gorges, gulleys, or small glens. The continual glacial recession and advancement over millennia contributed more to the formation of larger valleys and different geographical features. Overall, however, the steppe is known to be flat and expansive grassland. The vegetation was dominated by palatable, high-productivity grasses, herbs and willow shrubs. Although it was primarily a Eurasian and Beringian biome, an analog of the mammoth steppe existed on the southern edge of the Laurentide ice sheet in North America as well, and contained many of the same animals such as woolly mammoths, muskoxen, scimitar cats, and caribou.

The fauna was dominated by species such as reindeer, muskox, saiga antelope, steppe bison, horses, woolly rhinoceros and woolly mammoth. These herbivores, in turn, were followed and preyed upon by various carnivores, such as wolves, brown bears, Panthera spelaea (the cave or steppe-lion), cave hyenas, wolverines, among others, as well as scimitar-toothed cats and giant short-faced bears in east Beringia (with scimitar-toothed cats also having rare records from the mammoth steppe in Eurasia).

Wakhan National Park is a national park in northeastern Afghanistan. Established in 2014, the park encompasses the entire Wakhan District of Badakhshan Province, extending along the Wakhan Corridor between the Pamir Mountains and the Hindu Kush, bordering the Gorno-Badakhshan autonomous region of Tajikistan to the north, Khyber Pakhtunkhwa and Gilgit-Baltistan in Pakistan to the south, and the Xinjiang autonomous region of China to the east.

Flora and fauna in the Wakhan National Park include some 600 plant species, the snow leopard, lynx, wolf, brown bear, stone marten, red fox, Pallas's cat, ibex, Marco Polo sheep, and urial. Remote and largely above the tree line, poaching and overgrazing, rather than mining and logging, currently pose the main threats. Around 15,000 Afghans of ethnic Wakhi and Kyrgyz background reside in the area. Foreigners must have an Afghan visa to tour the area.