Thistle Gall Wasp vs Tumbling Flower Beetle

Side-by-side species comparison

Attribute Thistle Gall Wasp Tumbling Flower Beetle
Scientific Name Isocolus scabiosae Mordella aculeata
Order Hymenoptera Coleoptera
Family Cynipidae Mordellidae
Size 1.5-2.5 mm 3-6 mm
Habitat Meadows Meadows
Diet Gall Makers Pollen Feeders
Regions Europe, Western Asia Europe, North America
Conservation Least Concern Least Concern

Thistle Gall Wasp

A minute gall-inducing wasp that forms swellings on knapweed flower heads. It has been studied as a potential biocontrol agent for invasive knapweeds.

💡

Did You Know?

A single flower head can contain dozens of tiny gall chambers, each housing one larva.

Tumbling Flower Beetle

A small, humpbacked beetle that tumbles erratically when disturbed. Adults are commonly found on flowers where they feed on pollen.

💡

Did You Know?

Their pointed abdomen extends beyond the elytra, giving them a distinctive wedge shape.