Micro Caddisfly vs Old World Screwworm

Side-by-side species comparison

Attribute Micro Caddisfly Old World Screwworm
Scientific Name Lepidostoma pluviale Chrysomya bezziana
Order Trichoptera Diptera
Family Lepidostomatidae Calliphoridae
Size 7-10 mm 8-11 mm
Habitat Forests Forests
Diet Herbivores Parasites
Regions North America Sub-Saharan Africa, South Asia, Southeast Asia
Conservation Least Concern Least Concern

Micro Caddisfly

A small western caddisfly that builds neat cases from leaf discs in rain-fed headwater streams. Larvae are significant leaf-litter processors in Pacific Northwest forests.

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Did You Know?

Larvae switch from leaf-disc cases to mineral-grain cases when leaf material becomes scarce.

Old World Screwworm

An obligate wound parasite of mammals found across Africa and Asia. Larvae invade wounds and feed on living tissue causing severe myiasis.

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Did You Know?

Unlike the New World screwworm, no sterile insect program has yet successfully eradicated this species.