Lesser Cattle Grub vs Hornet Robber Fly

Side-by-side species comparison

Attribute Lesser Cattle Grub Hornet Robber Fly
Scientific Name Hypoderma lineatum Asilus crabroniformis
Order Diptera Diptera
Family Oestridae Asilidae
Size 11-13 mm 18-28 mm
Habitat Farmland Grasslands
Diet Parasites Predators
Regions North America, Europe, Asia Europe, North Africa
Conservation Least Concern Near Threatened (declining in northern Europe)

Lesser Cattle Grub

A hairy, bee-like fly slightly smaller than H. bovis, whose larvae also parasitize cattle. Unlike H. bovis, its larvae migrate through the esophageal wall rather than the spinal canal. It causes significant hide damage and meat trim losses in the cattle industry.

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Did You Know?

Warble damage to cattle hides makes them unsuitable for premium leather, costing the cattle industry millions in hide value annually.

Hornet Robber Fly

Europe's largest robber fly, a hornet mimic with a yellow-and-brown body that hunts dung beetles on grazed pastures. Females lay eggs in animal dung where larvae develop as predators.

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Did You Know?

It specifically hunts dung beetles, and its larvae develop as predators inside cow pats and horse droppings.