Fleas
Ctenocephalides felis (cat flea), the main flea on U.S. cats and dogs · Bed Bugs, Fleas & Lookalikes
Fleas are tiny jumping, blood-feeding insects that mostly arrive on cats and dogs; the cat flea attacks both pets and will bite people too. Their eggs fall off pets into carpets, bedding and furniture, so infestations build up where pets rest. Bites are itchy, and fleas can occasionally carry disease germs and pet tapeworms.
Look for: A pinhead-sized, reddish-brown insect flattened side to side that jumps instead of flying, often spotted on pets or on white socks around the ankles.
Quick facts
| Size | up to 3 mm |
|---|---|
| Legs | 6 |
| Usual colors | brown |
| Where in the home | Living Room, Bedroom |
| Active | All year |
| Peak | Apr, May, Jun |
| U.S. range | Found throughout the U.S. wherever pets live; outdoor populations do best where it is mild and humid. |
| Bites or stings people | Yes |
Seasons are typical across much of the U.S. and vary by region.
Peak season Active Typical across much of the U.S.; varies by region.
Often confused with
Sources
Not sure this is your bug? Try the Bug Identifier or ask your local Cooperative Extension office.