Is it a stink bug?

The stink bug is a shield-shaped insect commonly found on garden plants and occasionally entering homes.

CC0 photograph via iNaturalist (research-grade identification)

whichbug identifies insects from what you can see. It does not identify bites and has no health information.

What to look for

Size	10-18 mm
Colour	green, brown, or mottled gray
Shape	broad shield or oval with a distinct shoulder-like projection
Wings	two pairs, with the forewings partially hardened at the base
Antennae	five-segmented, slender, and dark-tipped
Movement	slow crawler that flies when disturbed

Where you'll find them

under leaves on garden plantsin cracks around window framesbehind siding or eavesin stored producein garages or sheds

plant pest feeds on fruits, vegetables, and ornamental plants causing deformities and scarring.

Season: late summer through autumn

Signs it's around

clusters of small, barrel-shaped eggs on leaf undersides
irregular holes or brown spots on fruit and vegetables
shiny, dark fecal spots on leaves
empty exoskeletons (exuviae) near feeding sites

Not sure? The lookalikes

vs kissing bug	stink bugs have a broad shield shape while kissing bugs have a long, narrow body with a distinct beak
vs boxelder bug	stink bugs lack the prominent red markings and black body pattern of boxelder bugs
vs squash bug	squash bugs have a more elongated, less shield-like body and distinct white spots on the wing edges

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