The inconspicuous small grey or charcoal coloured moth and the caterpillars are rarely seen, but the rolled leaves of aspens are a giveaway. Rolling up in leaves protects the cream coloured, brown-headed caterpillars against predation, and is a common strategy in Tortricid caterpillars, of which the Aspen Leafroller is a member.
The aspen leafroller overwinters as a pupa, and emerges as an adult when things warm up in spring. The moth completes its remaining purpose – to mate and lay eggs. The successful female lays her eggs on the aspen, and the emerging caterpillars get busy as soon as they hatch.
There are other leaf-rolling caterpillars in Alberta, each of them with their own favorite trees to roll and eat the leaves from. Leafrollers rarely do any real harm to a healthy tree.
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Where to find Aspen leafrollers in Alberta
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Aspen leafroller Behaviour
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Interesting Facts about Aspen leafrollers
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Recent Aspen leafroller Reports in Alberta
Town of Devon
Aspen leafroller Hotspots in Alberta
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