description Treeline Emerald Overview
The Treeline Emerald (Somatochlora sahlbergi) is a circumboreal dragonfly species recognized for its extreme northern habitat range. As its name suggests, it predominantly inhabits small pools and marshes near the Arctic treeline across North America, Europe, and Asia. This dragonfly belongs to the emerald family Corduliidae and is distinguished by its dark metallic green coloration. It is of particular interest to biogeographers and entomologists who study species adapted to subarctic environments.
help Treeline Emerald FAQ
What makes the Treeline Emerald dragonfly's habitat unusual?
The Treeline Emerald is a circumboreal species recognized for its extreme northern habitat range, frequently inhabiting pools and wetlands near the Arctic treeline. This makes it one of the most northerly-dwelling dragonfly species in the world.
Where does the Treeline Emerald live?
The species is found in circumboreal regions, meaning it occurs in the northern latitudes of both Eurasia and North America. It is particularly associated with the transitional zone where boreal forest gives way to open tundra.
How does the Treeline Emerald survive in cold northern climates?
As a circumboreal species, the Treeline Emerald is adapted to the very short summer season of high latitudes, completing its aquatic larval stage in cold-water pools near the Arctic treeline. Its presence demonstrates that some dragonfly species can complete their life cycles in some of the coldest environments where any odonates occur.
When is the flight season for the Treeline Emerald?
Given its extreme northern range near the Arctic treeline, the Treeline Emerald's adult flight season is compressed into the brief warm weeks of the boreal summer. Like other northern dragonflies, it must mate, oviposit, and complete its above-water activities within a very short window each year.
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