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How are thrips populations replaced after cold weather kills some individuals?

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Detailed illustration of a western flower thrips, Frankliniella occidentalis, showing its elongated yellow-brown body, six legs, and two pairs of fringed wings spread outward. — thrips Western flower thrips (*Frankliniella occidentalis*).

In regions with cold winters, thrips populations that perish due to freezing temperatures are replaced annually by spring migrants arriving from warmer areas.1

While many thrips survive cold weather by hibernating as adults or immature forms in the ground, hollow stems, or detritus, those that do not survive are replenished by these seasonal migrations.1