Eastern Forktail vs Dog Biting Louse

Side-by-side species comparison

Attribute Eastern Forktail Dog Biting Louse
Scientific Name Ischnura verticalis Trichodectes canis
Order Odonata Phthiraptera
Family Coenagrionidae Trichodectidae
Size 21-33 mm 1.5-2 mm
Habitat Ponds & Lakes Underground
Diet Omnivores Omnivores
Regions North America Europe, Asia, North America
Conservation Least Concern Least Concern

Eastern Forktail

A small damselfly where males are green and black with a blue tail tip. Young females are bright orange but turn olive-grey with age.

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Did You Know?

Young females are striking bright orange, a color they lose completely as they mature.

Dog Biting Louse

A chewing louse that infests domestic dogs, feeding on skin debris and secretions. It can serve as an intermediate host for the dog tapeworm.

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Did You Know?

Dogs can acquire tapeworm infections by accidentally swallowing these lice during grooming, as the lice carry tapeworm larvae.