| Scientific name | Aphidoidea superfamily |
|---|---|
| Group | True Bugs |
| Size | 1–3 mm (up to about 0.12 in) |
| Colors | Green, Black, White and Yellow |
| Legs | 6 legs |
| Wings | No (as usually seen) |
| Where found | Garden or plants |
| Most active | Spring and Summer |
| Bites | No |
| Stings | No |
| Risk level | Nuisance |
How to identify it
The aphid is a tiny member of the true bugs group. Piercing, straw-like beaks and wings that overlap in an X on the back. Check for these three features:
- Pear-shaped, soft body, often green or black
- Two small tailpipes (cornicles) on the rear
- Dense colonies with sticky, shiny leaves below
About this bug
A tiny, soft, pear-shaped insect that clusters on new shoots and leaf undersides to suck sap. Aphids reproduce quickly and leave sticky honeydew that attracts ants.
You'll usually find aphids in gardens and on plants. They are most active in spring and summer.
Is it dangerous?
Aphids don't bite people; heavy colonies curl leaves and spread plant viruses.
Our rating: Nuisance, meaning it is a nuisance pest but not a health threat to most people.
When you'll see aphids
Aphids are most active in spring and summer. In spring, overwintering adults become active and many species lay their first eggs. Summer heat speeds up development, so populations can grow quickly.
Typical places to check: garden or plants.
About true bugs
The aphid is one of the true bugs. True bugs have piercing, straw-like mouthparts used to suck plant sap or, in a few species, blood. They develop through gradual metamorphosis: nymphs look like small, wingless adults and molt several times as they grow. Many release strong odors from scent glands when threatened.
Because nymphs look like adults, you'll often see mixed sizes of the same bug together, which is a good sign that a population is breeding nearby.
What to do about it
- Blast colonies off plants with a strong spray of water
- Encourage ladybugs, lacewings and parasitic wasps
- Use insecticidal soap on persistent colonies, covering leaf undersides
Read the full guide: how to get rid of aphids.
Bugs that look similar
Group: Aphid belongs to true bugs, while green lacewing belongs to other insects. Piercing, straw-like beaks and wings that overlap in an X on the back.
Frequently asked questions
What does an aphid look like?
Pear-shaped, soft body, often green or black. Adults measure 1–3 mm (up to about 0.12 in).
Does the aphid bite or sting?
It does not bite. It does not sting. Aphids don't bite people; heavy colonies curl leaves and spread plant viruses.
Where do aphids live?
Aphids live in gardens and on plants.
When are aphids most active?
Mostly in spring and summer.