Invasive Animals
Several introduced animals now occur in Yukon. Most are not considered invasive, but some can harm native species, alter habitats, or spread through human activity.
YISC focuses on prevention, early detection, and clear public information so Yukoners can recognize species of concern and report unusual sightings.
Invasive Invertebrates
A small number of introduced invertebrates are considered invasive or potentially harmful in the Yukon context. These species can arrive through horticulture, soil, plant material, firewood, equipment, or accidental release. Please do not intentionally release non-native insects, worms, slugs, or other invertebrates into the wild.
Seven-spotted Lady Beetle (Coccinella
The Seven-spotted Lady Beetle is an introduced lady beetle that can compete with native lady beetles, including the Transverse Lady Beetle (Coccinella transversalis). If you see unusual lady beetles, clear photos can help with identification.
Multi-coloured Asian Lady Beetle (Harmonia axyridis)
The Multicoloured Asian Lady Beetle is another introduced lady beetle of concern. Like the Seven-spotted Lady Beetle, it may affect native lady beetle populations through competition.
Octagonal-tail Worm (Dendrobaena octaedra)
The Octagonal-tail Worm is an introduced earthworm that can affect soil and forest-floor conditions. If you suspect this species, avoid moving soil, compost, bait, or plant material from the site, and report the observation for review.
Larch Sawfly (Pristiphora erichsonii)
The Larch Sawfly is an introduced insect associated with larch. Please report suspected sightings so records can be reviewed and tracked.