Larch Needleworm Infestation Hits Banff and Lake Louise

The annual larch tree viewing season in Banff and Lake Louise has been affected by an outbreak of native caterpillars that feed on larch needles, causing severe defoliation.

The larch needleworm infestation, which is the first recorded incident in these areas, has resulted in trees appearing reddish brown, scorched or sparse, with many not displaying their characteristic golden-yellow colour this fall.

Parks Canada officials say that while it may look alarming, this is a natural part of the ecosystem and the affected trees should recover by next year.

The core of the infestation lies within Banff National Park, particularly in the area between Sundance and Bow mountain ranges, near Healy Creek and Lake Louise. Popular larch hiking areas such as Healy Pass, Taylor Lake, and Moraine Lake have also been affected.