Since the pine beetle infestation during the 1980's much of the alpine vegetation as yet to return, resulting in the areas looking bare and uncultivated.

An outbreak of Western Hemlock Looper Moths in Vancouver, linked to climate stressors, has led to significant tree damage and is part of a global trend of increasing insect infestations.

Construction of flood control berms in the city of Medicine Hat appears to have facilitated the proliferation of invasive flora in the city.

For a decade, Fenwick, Ontario faced severe defoliation by invasive spongy moths, despite aerial bacterial treatments reducing their numbers.