Mountain Robber Fly vs Milkweed Assassin Bug

Side-by-side species comparison

Attribute Mountain Robber Fly Milkweed Assassin Bug
Scientific Name Machimus rusticus Zelus longipes
Order Diptera Hemiptera
Family Asilidae Reduviidae
Size 12-18 mm body length 16-20 mm
Habitat Meadows Gardens
Diet Predators Predators
Regions Europe, Mediterranean mountains North America, Central America, South America
Conservation Least Concern Least Concern

Mountain Robber Fly

A powerful aerial predator found in dry mountain meadows and rocky slopes. It catches other insects in flight with its spiny legs.

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Did You Know?

It injects paralytic saliva into prey and digests them externally before consuming the liquefied contents.

Milkweed Assassin Bug

A slender, brightly colored assassin bug with red and black markings. It is a generalist predator common in gardens and agricultural fields.

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Did You Know?

It coats its legs with sticky resin to trap small insects, functioning as a living flypaper strip.