Rice Weevil vs Confused Flour Beetle
Rice Weevils and confused flour beetles are easy to mix up at a glance, but a few details separate them quickly. Here is how to tell which one you found and what, if anything, you should do about it.
Quick answer
Check for this first. A rice weevil has long, narrow snout extending from the head, while a confused flour beetle has flat, elongated reddish-brown body.
Side-by-side comparison
| Rice Weevil | Confused Flour Beetle | |
|---|---|---|
| Group | Beetles | Beetles |
| Scientific name | Sitophilus oryzae | Tribolium confusum |
| Size | 2–3 mm | 3–4 mm |
| Colors | Brown and Red | Brown and Red |
| Legs | 6 legs | 6 legs |
| Wings | Yes | Yes |
| Bites or stings | No | No |
| Risk | Nuisance | Nuisance |
| Key feature | Long, narrow snout extending from the head | Flat, elongated reddish-brown body |
Key differences
- Signature feature: Rice Weevils: long, narrow snout extending from the head. Confused Flour Beetles: flat, elongated reddish-brown body.
How to identify rice weevils
A small, dark weevil with a long snout and four faint reddish spots on its back. Females chew holes in whole grains such as rice, wheat and corn and lay an egg inside each kernel.
- Long, narrow snout extending from the head
- Four faint orange or reddish spots on the wing covers
- Pitted thorax and the ability to fly
How to identify confused flour beetles
A flat, slender, reddish-brown beetle common in flour, cake mixes, cereals and other milled foods. Heavy infestations leave a grayish tint and a sharp, unpleasant smell.
- Flat, elongated reddish-brown body
- Antennae that thicken gradually toward the tip
- Found in flour and powdery foods rather than whole grains
Which one is more dangerous?
Neither is more dangerous than the other; both are rated nuisance on our scale.
Rice weevils cannot bite people and are not harmful if accidentally eaten, but they spoil grain. They don't bite or sting; infested flour tastes and smells bad.
Where and when you'll see each
Rice Weevils turn up in pantries and stored food and in the kitchen, mostly in spring, summer, fall and winter. Confused Flour Beetles turn up in pantries and stored food and in the kitchen, mostly in spring, summer, fall and winter.
Because they share habitat, you may find both in the same place, so check each individual.
What to do if you find one
Rice Weevils: Throw out infested rice, grain, pasta and whole seeds. Read the full removal guide for more.
Confused Flour Beetles: Discard infested flour and mixes in a sealed outdoor bin. Read the full removal guide for more.
Biology: beetles
Beetles go through complete metamorphosis: egg, larva (grub), pupa and adult. The larval stage often does the most feeding and damage, and it can last from a few weeks to several years depending on the species. Adults protect their flight wings under hard wing covers called elytra, which is why most beetles look armored and meet in a neat line down the back.
Frequently asked questions
What is the main difference between rice weevils and confused flour beetles?
Signature feature: Rice Weevils: long, narrow snout extending from the head. Confused Flour Beetles: flat, elongated reddish-brown body.
Which is bigger, a rice weevil or a confused flour beetle?
Rice Weevil: 2–3 mm. Confused Flour Beetle: 3–4 mm.
Do rice weevils or confused flour beetles bite?
Rice Weevils do not bite. Confused Flour Beetles do not bite.
Where are they usually found?
Rice Weevils: in pantries and stored food and in the kitchen. Confused Flour Beetles: in pantries and stored food and in the kitchen.