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Voltinism

Voltinism is the number of broods or generations of an organism within a year. Different types of voltinism exists and describe whether an organism has one, two or many broods a year.

A photograph of a Speckled Wood butterfly (_Pararge aegeria_).

A photograph of a Speckled Wood butterfly (Pararge aegeria). The Speckled Wood butterfly can have one or two broods a year.

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