Alder Leaf Beetle vs Ruddy Darter

Side-by-side species comparison

Attribute Alder Leaf Beetle Ruddy Darter
Scientific Name Agelastica alni Sympetrum sanguineum
Order Coleoptera Odonata
Family Chrysomelidae Libellulidae
Size 6-7 mm 34-39mm
Habitat Ponds & Lakes Ponds & Lakes
Diet Herbivores Blood Feeders
Regions Europe, Western Asia Europe, Asia
Conservation Least Concern Least Concern

Alder Leaf Beetle

A metallic dark violet-blue beetle that feeds on alder trees. Heavy infestations can completely defoliate alder trees along waterways.

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Did You Know?

After being absent from Britain for decades, it dramatically recolonised southern England in the early 2000s.

Ruddy Darter

A small dragonfly where mature males turn deep blood-red with a distinctly club-shaped abdomen. Females remain golden-yellow. It has entirely black legs unlike similar species.

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Did You Know?

Pairs mate in flight, forming a heart-shaped wheel, then the female flicks eggs onto water while still attached to the male.