Is It a Mosquito? How to Tell Mosquitoes From Look-Alikes
Mosquitoes: 4 marks to check, what they are often confused with, whether they bite or sting, and where they turn up, quoted from university entomology and IPM sources.
At a glance
- Group: Mosquitoes of major concern in California belong to the genera Culex, Aedes, and Anopheles.
- Body plan: Small, delicate, two-winged flies; females have a long, slender proboscis (piercing-sucking mouthparts) and small scales cover their long, slender wings.
- Bites or stings: Female mosquitoes bite to obtain blood needed to develop eggs; bites can transmit disease-causing viruses to humans.
- Where you find them: Mosquito larvae occur in stagnant or nearly still water — surface pools, tree holes, or man-made containers; species habitats in California range from below-sea-level deserts to high mountain meadows.
How to tell it is one of the mosquitoes
- Vs. crane fly: crane flies are larger than mosquitoes and their wings lack the scales found on mosquito wings.
- Mosquito wings are covered in small scales, unlike crane fly wings.
- Only female mosquitoes bite/feed on blood; males feed on plant juices/sugar sources, not blood.
- Crane flies (often nicknamed "mosquito hawks") are harmless and do not bite, unlike mosquitoes — the belief that they prey on mosquitoes is itself described as a common misconception in the source.
Often confused with
People most often mix mosquitoes up with:
Open the other page and compare its list against the marks above; the differences are usually in the antennae, wings or the way the body is divided.
Bites and stings
Female mosquitoes bite to obtain blood needed to develop eggs; bites can transmit disease-causing viruses to humans. Seek medical care promptly for severe symptoms or any allergic reaction.
Pest or beneficial?
Mosquitoes are treated as a pest/public-health concern because their bites can transmit viruses that cause human disease.
Where they turn up
Mosquito larvae occur in stagnant or nearly still water — surface pools, tree holes, or man-made containers; species habitats in California range from below-sea-level deserts to high mountain meadows.
How to photograph it for identification
Get as close as your camera will focus, from directly above, in daylight or a bright lamp. Include the whole body with the legs and antennae in frame; a second shot from the side shows wings and body segments. Put a coin or ruler next to it for scale. For a bite or a bug found on skin or bedding, photograph the bug itself, not the mark. The app names the likely group; use the list above to confirm.
FAQ
Do mosquitoes bite or sting?
Female mosquitoes bite to obtain blood needed to develop eggs; bites can transmit disease-causing viruses to humans. Seek medical care promptly for severe symptoms or any sign of an allergic reaction.
What is the quickest way to recognize mosquitoes?
Vs. crane fly: crane flies are larger than mosquitoes and their wings lack the scales found on mosquito wings.
Are mosquitoes a pest?
Mosquitoes are treated as a pest/public-health concern because their bites can transmit viruses that cause human disease.
How do I tell mosquitoes from flies?
Mosquito wings are covered in small scales, unlike crane fly wings. Crane flies (often nicknamed "mosquito hawks") are harmless and do not bite, unlike mosquitoes — the belief that they prey on mosquitoes is itself described as a common misconception in the source. The Flies page lists its own marks.
Related
See what's really crawling, flying, and buzzing past.
Start with a single photo.
Sources
Updated 2026-09-11.