Aspects of this topic are discussed in the following places at Britannica.
...Most vertebrates and some invertebrates, such as arthropods, including insects, exhibit territorial behaviour. Possession of a territory involves aggressive behaviour and thus contrasts with the home range, which is the area in which the animal normally lives. Home range is not associated with aggressive behaviour, although parts of the home range may be defended: in this case the defended...
Given that species differ in their risk of extinction, the size of a species’ geographic range is by far the best explanation for the differences. Species with small ranges are much more vulnerable than those with large ranges, simply because it is much easier to destroy the former than the latter.
in conservation: Global change )It is now clear that most species are shifting their geographic ranges toward cooler places and are starting important events such as breeding, migration, and flowering earlier in the year. One study, published in the early 21st century, found that more than 80 percent of nearly 1,500 species of animals and plants from a wide variety of habitats worldwide were changing in the direction expected...
in conservation: Size of home range )...in large packs that roam very large areas, in contrast to the two cat species, which are mostly solitary and which have smaller home ranges. The more widely a species moves (i.e., the larger its home range), the more likely it is to move beyond areas where it is protected.
...than either gorillas or orangutans. They are highly social and live in loose and flexible groups known as communities, or unit groups, that are based on associations between adult males within a home range, or territory. Home ranges of forest-dwelling communities can be as small as a few square kilometres, but home ranges covering hundreds of square kilometres are known among savanna...
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