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are unable to mate with one another but rather due to geography and slight differences in breeding behavior or chemical signals. Cryptic species may arise not only from true morphological similarity but also because high within-species variation can obscure differences between species, making divergent lineages appear deceptively similar.
:; ; Species flock
: A species flock--also known as a species swarm--occurs when, in a limited geographic area, a single species evolves into multiple distinct species which each fill their

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