Cline (biology)
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In biology, a cline is a measurable gradient in a single characteristic of a species across its geographical range. Clines usually have a genetic, or phenotypic character. They can show either smooth,
Bergmann's Rule demonstrated showing the difference in size between a larger northern fox, whose range spans colder regions, and a smaller desert fox, whose range is primarily in hot regions
Subspecies
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A subspecies is a taxonomic rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics, but that can successfully interbreed. Not
Cline (biology)
…the notion of clines as an "auxiliary taxonomic principle,” meaning that clinal variation in a species is not awarded taxonomic recognition in the way subspecies or species are. The term cline was coined by Huxley in 1938 from the Greek κλίνειν klinein, meaning "to lean.” While it and the term ecotype are sometimes…
Ceylon paradise flycatcher (Terpsiphone paradisi ceylonensis), an Indian paradise flycatcher subspecies native to Sri Lanka
African leopard (Panthera pardus pardus), the nominotypical (nominate or definitive) leopard subspecies native to Africa
Sunda Island tiger (P. tigris sondaica), a tiger subspecies native to the Sunda islands
The Indian rhinoceros (Rhinoceros unicornis) is a monotypic species.