Black-Tailed Deer Fly vs Striped Crawling Water Beetle

Side-by-side species comparison

Attribute Black-Tailed Deer Fly Striped Crawling Water Beetle
Scientific Name Chrysops niger Haliplus lineaticollis
Order Diptera Coleoptera
Family Tabanidae Haliplidae
Size 7-10 mm 3-4 mm
Habitat Wetlands Wetlands
Diet Blood Feeders Herbivores
Regions Northeastern United States and southeastern Canada Europe
Conservation Least Concern Least Concern

Black-Tailed Deer Fly

A small dark deer fly with mostly blackened wings and green iridescent eyes. It is an aggressive daytime biter commonly encountered near wooded wetlands.

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Did You Know?

It is most active during overcast humid days and tends to bite repeatedly if swatted away without being killed.

Striped Crawling Water Beetle

A small yellowish-brown beetle with distinctive dark longitudinal stripes on the pronotum. It is commonly found in weedy ponds and marshes throughout Europe.

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Did You Know?

Larvae have an unusual body form with long lateral projections that help them cling to algal mats.