American Marsh Treader vs Horned Aphid

Side-by-side species comparison

Attribute American Marsh Treader Horned Aphid
Scientific Name Hydrometra martini Tuberaphis styraci
Order Hemiptera Hemiptera
Family Hydrometridae Hormaphididae
Size 8-11 mm 1-2.5 mm
Habitat Wetlands Forests
Diet Predators Sap Feeders
Regions North America Japan, East Asia
Conservation Least Concern Not Evaluated

American Marsh Treader

A very thin, elongate bug with a head nearly as long as its thorax. It creeps slowly along floating debris and sphagnum mats at the edges of ponds and marshes.

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Did You Know?

It moves so slowly and deliberately that it rarely disturbs the water surface, making it nearly invisible to predators.

Horned Aphid

A social aphid from East Asia that forms colonies defended by sterile soldier nymphs with horned heads. They live on styrax trees and produce a single soldier caste.

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Did You Know?

Soldiers stab intruders with their sharp horns and inject a toxic secretion, dying in the process like a honeybee's suicide sting.