Defining ‘species’ is a fuzzy art

A schoolroom word. A vital concept. A beast to define.

Heliconius butterflies

SPECIES SCHMECIES  This swarm of diversely patterned Heliconius butterflies is actually just two species known for mimicry. How to define a species turns out to have more pitfalls than these butterflies have spots.

Nicolle Rager Fuller

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