Broad-shouldered Leaf Beetle vs Secondary Screwworm Fly

Side-by-side species comparison

Attribute Broad-shouldered Leaf Beetle Secondary Screwworm Fly
Scientific Name Chrysomela tremula Cochliomyia macellaria
Order Coleoptera Diptera
Family Chrysomelidae Calliphoridae
Size 7-11 mm 8-12 mm
Habitat Farmland Farmland
Diet Herbivores Carrion Feeders
Regions Europe, Siberia North America, South America
Conservation Least Concern Least Concern

Broad-shouldered Leaf Beetle

A robust, convex beetle with dark metallic greenish-black to bronze elytra and irregular rows of punctures. It is closely associated with aspen and poplar trees.

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Did You Know?

Populations of this beetle can reach outbreak levels in aspen plantations, completely stripping trees of their foliage.

Secondary Screwworm Fly

A blow fly that breeds in carrion and occasionally infests wounds in livestock. It is widely used in forensic studies in the Americas.

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Did You Know?

Unlike the primary screwworm, it only feeds on dead tissue rather than living flesh.