Sympatry
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In biology, two closely related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter each other. An initially interbreeding populat
Sympatric pitcher plants, Nepenthes jamban (left) and Nepenthes lingulata (right) in Sumatran upper montane forest
Great spotted cuckoo, sympatric with the magpie
Triturus Cristatus First Year Male First Year
Triturus marmoratus 2
Parapatric speciation
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In parapatric speciation, two subpopulations of a species evolve reproductive isolation from one another while continuing to exchange genes. This mode of speciation has three distinguishing characteri
Anthoxanthum odoratum
Darwin's finches by Gould