Cardinal Click Beetle vs Common Duckweed

Ampedus cardinalis compared with Lemna minor

Key Differences

Cardinal Click Beetle is Critically Endangered while Common Duckweed is Least Concern.

Taxonomic Classification

Rank	Cardinal Click Beetle	Common Duckweed
Kingdom	Animalia (hayvan)	Plantae (bitki)
Phylum	Arthropoda (Eklem bacaklılar)	Magnoliophyta (Flowering Plants)
Class	Insecta (böcek)	Liliopsida (Monocots)
Order	Coleoptera (Kın kanatlılar)	Alismatales (Alismatales)
Family	Elateridae	Araceae
Genus	Ampedus	Lemna
Species	Ampedus cardinalis	Lemna minor

Conservation Status

Cardinal Click Beetle

CR — Critically Endangered

Common Duckweed

LC — Least Concern

Physical Characteristics

Attribute	Cardinal Click Beetle	Common Duckweed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cardinal Click Beetle

Habitat

Inhabits temperate coniferous forests within the Palearctic biogeographic realm.

Range

Distributed across Denmark, Norway, Sweden, and Switzerland. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Duckweed

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Widely distributed across Europe (8 countries), North America (Canada, United States), Oceania and the Pacific (Australia), and South America (Brazil, Guyana).

Cardinal Click Beetle

The Cardinal Click Beetle (Ampedus cardinalis) is a species in the genus Ampedus. It is currently classified as Critically Endangered (CR) on the IUCN Red List. Inhabits temperate coniferous forests within the Palearctic biogeographic realm.

Common Duckweed

<em>Lemna minor</em>, commonly known as common duckweed, is a tiny floating aquatic plant in the family Araceae, recognized as one of the smallest flowering plants on Earth. Classified as Least Concern by the IUCN, the species enjoys a broad distribution across Europe, North America, Oceania, and South America, colonizing a diverse array of habitats including grasslands, wetlands, forests, and cultivated land with access to standing or slow-moving water. It typically inhabits ponds, lakes, ditches, and quiet streams, forming extensive green mats on the water surface. <em>Lemna minor</em> reproduces predominantly through asexual budding, allowing populations to expand rapidly under favorable conditions. The species provides vital ecosystem services, stabilizing nutrient cycles, reducing algal blooms through competition, and offering food and shelter for aquatic invertebrates, fish, and waterfowl. Due to its sensitivity to water quality, it is frequently used as a bioindicator in ecotoxicological research. Common duckweed has also attracted scientific interest for its potential in wastewater treatment and as a high-protein animal feed supplement. Biological traits of this species remain poorly documented in the scientific literature.