Dog Flea vs Boxelder Bug

Side-by-side species comparison

Attribute Dog Flea Boxelder Bug
Scientific Name Ctenocephalides canis Boisea trivittata
Order Siphonaptera Hemiptera
Family Pulicidae Rhopalidae
Size 2-3.5 mm 11-14 mm
Habitat Underground Underground
Diet Blood Feeders Sap Feeders
Regions Europe, Asia, Africa, North America North America
Conservation Least Concern Least Concern

Dog Flea

A flea historically associated with domestic dogs but actually less common on dogs than the cat flea. Distinguished by its more rounded head profile.

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Did You Know?

Despite being called the dog flea, this species is often outnumbered on dogs by cat fleas at a ratio of ten to one.

Boxelder Bug

A black and red bug that forms large aggregations on and around boxelder trees in autumn. It is commonly seen warming itself on sunny building walls before entering structures to overwinter. It is harmless but considered a nuisance pest.

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Did You Know?

Thousands of individuals can aggregate on the south-facing walls of buildings on warm autumn days, creating dramatic displays before entering homes to overwinter in wall voids.