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Lists of animals. Appearance. The giant panda is a vulnerable species. The use of love darts by the land snail Monachoides vicinus is a form of sexual selection. Adult silk worm. Animals are multicellular eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to ...
Many animal species have spiritual significance in different cultures around the world, and they and their products may be used as sacred objects in religious rituals. For example, eagles, hawks and their feathers have great cultural and spiritual value to Native Americans as religious objects. In Hinduism the cow is regarded as sacred.
Over 1.5 million livinganimal specieshave been described, of which around 1.05 million are insects, over 85,000 are molluscs, and around 65,000 are vertebrates. It has been estimated there are as many as 7.77 million animal species on Earth. Animal body lengths range from 8.5 μm (0.00033 in) to 33.6 m (110 ft).
The term is most often applied to Earthor some parts of Earth. This environment encompasses the interaction of all living species, climate, weather and natural resources that affect human survival and economic activity.[1] The concept of the natural environmentcan be distinguished as components:
A swarm of common starlings. Numbering over 310 million, this species contains at least as many individuals as the United States does humans. [ 1 ][ 2 ] Mammals by population. Lists. Even-toed ungulates (Artiodactyla) Carnivorans (Carnivora) Cetaceans (Cetacea) Bats (Chiroptera) Odd-toed ungulates (Perissodactyla) Primates (Primates) Key.
Biodiversity is commonly measured in terms of taxonomic richness of a geographic area over a time interval. In order to calculate biodiversity, species evenness, species richness, and species diversity are to be obtained first. Species evenness[ 181 ] is the relative number of individuals of each species in a given area.
Nature is an inherent character or constitution, [ 1 ] particularly of the ecosphere or the universe as a whole. In this general sense nature refers to the laws, elements and phenomena of the physical world, including life. Although humans are part of nature, human activity or humans as a whole are often described as at times at odds, or ...
Domestication is a gradual process, so there is no precise moment in the history of a given species when it can be considered to have become fully domesticated. Zooarchaeology has identified three classes of animal domesticates: Pets (dogs, cats, ferrets, hamsters, etc.) Livestock (cattle, sheep, pigs, goats, etc.)