Spine-legged Robber Fly vs Giant Water Bug

Side-by-side species comparison

Attribute Spine-legged Robber Fly Giant Water Bug
Scientific Name Diogmites angustipennis Lethocerus americanus
Order Diptera Hemiptera
Family Asilidae Belostomatidae
Size 12-18 mm 50-65 mm
Habitat Deserts & Drylands Ponds & Lakes
Diet Predators Predators
Regions North America North America
Conservation Least Concern Least Concern

Spine-legged Robber Fly

A slender amber-colored robber fly with conspicuously spined legs. It hunts from the ground in open sandy or rocky areas.

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Did You Know?

Its heavily spined legs form a basket-like cage to trap prey in mid-air.

Giant Water Bug

One of the largest true bugs. Powerful predator that catches fish, frogs, and even small snakes. Males carry eggs on their backs until hatching. Known as "toe-biters."

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Did You Know?

Giant water bugs are devoted fathers — males carry up to 100 eggs on their backs for weeks, regularly doing push-ups at the water surface to keep eggs oxygenated.