Call (613) 743-8074 Size, markings and where the insect was found can help separate five cockroaches encountered in and around Ontario buildings. Professional confirmation is important before choosing a response.
German cockroaches are the principal indoor-breeding concern, while other species are connected with drains, damp lower levels, dry elevated rooms or wooded exteriors.
A small indoor cockroach identified by two dark stripes behind the head. German cockroaches reproduce quickly in warm areas close to food and moisture.
A large reddish-brown cockroach associated with drains, sewers, mechanical rooms and other warm, humid spaces.
A dark, broad cockroach strongly associated with cool, damp locations, drains and ground-level harbourage.
A small indoor cockroach distinguished by pale bands across the body and a preference for warmer, drier locations away from plumbing.
An outdoor woodland cockroach that may enter with firewood or fly toward lights. Correct identification prevents confusion with indoor-breeding species.
| Species | Size | Colour and markings | Typical location | Flight |
|---|---|---|---|---|
| German Cockroach | 13–16 mm | Tan to light brown with two dark lengthwise stripes | Warm, humid kitchens and bathrooms | Winged but does not normally fly |
| American Cockroach | 35–40 mm | Reddish brown with a pale margin on the pronotum | Drains, basements and warm utility areas | Fully winged; may glide in warm conditions |
| Oriental Cockroach | Approximately 20–27 mm | Very dark brown to nearly black | Cool, damp basements, drains and crawlspaces | Cannot fly |
| Brown-Banded Cockroach | Approximately 12–14 mm | Brown with pale bands across wings or abdomen | Warm, dry, elevated rooms and furniture | Adult males may fly when disturbed |
| Pennsylvania Wood Cockroach | Males up to about 25 mm; females smaller | Chestnut brown with pale wing margins | Wooded exteriors, firewood and porch lights | Adult males fly and are attracted to lights |
Similar-looking cockroaches use different harbourage and entry routes. Avoid unlabelled products or mixing treatment methods. Preserve a clear photo when safe and contact Emerald Pest Control for identification and recommendations appropriate to the property.
Contact Emerald Pest ControlSend us the location, property details and a clear photo for professional follow-up.