A univoltine species is a species that has one brood of offspring per year. Many species try and coincide their life cycle with that of another species (such as a food plant) on which they rely. Some univoltine species have long-lived adults.
In the UK, many species of butterfly are univoltine and have just one brood per year. In many cases the butterflies over winter as a chrysalis before emerging and reproducing the following year.
An adult female orange tip butterfly, Anthocharis cardamines. This species is univoltine in the UK.
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