Zygoptera

Selys, 1854

Damselflies

Family Guides

5

is one of three suborders of Odonata, comprising approximately 3,297 of . Members are distinguished from dragonflies (Anisoptera) by their smaller size, slender bodies, and the habit of folding wings along the body when at rest. The group has existed since at least the Lower Permian and is found on every continent except Antarctica. Damselflies serve as biocontrol agents and environmental bioindicators due to their dependence on both aquatic and terrestrial .

Lestes stultus by (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda. Used under a CC-BY license.Ischnura ramburii by no rights reserved, uploaded by Steve Wells. Used under a CC0 license.Ischnura posita by (c) Kathy Richardson, some rights reserved (CC BY), uploaded by Kathy Richardson. Used under a CC-BY license.

Pronunciation

How to pronounce Zygoptera: /zaɪˈɡɒptərə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from Anisoptera (dragonflies) by: wings folded back along body at rest (most ); widely separated and lateral; smaller, more slender build; weaker . Four main in regional faunas: Coenagrionidae (pond damselflies), Calopterygidae (broad-winged damselflies), Platycnemididae (white-legged ), and Chlorocyphidae (jewels).

Images

Appearance

Smaller and more slender-bodied than dragonflies. Most fold wings together along the body when at rest, unlike Anisoptera which hold wings spread perpendicular to the body. Wings are typically narrower and more delicate. are widely separated on the sides of the rather than meeting at the top. is long and thin relative to body size.

Habitat

Aquatic and semi-aquatic environments including streams, rivers, ponds, and wetlands. Larval stage is fully aquatic. found near water bodies where they emerged, often in vegetation along shorelines. Research in Bogani Nani Wartabone National Park found highest in primary forest, but greatest abundance in agricultural areas.

Distribution

Global distribution on every continent except Antarctica. Present in tropical, temperate, and regions. Specific studies document occurrence in: North, Central, and South America; Europe; Asia (including Indonesia, China, Thailand); Australia; Papua New Guinea; Africa (Namibia); and Middle East (Iran).

Diet

Both larvae and are . Larvae use a prehensile foldable lower lip () unique among insects to capture prey including mosquito larvae and small fish. Adults hunt by sight and seize prey on the wing, feeding on other small insects.

Life Cycle

Hemimetabolous development with aquatic larval stage (naiad) and terrestrial stage. Larvae are aquatic . Duration of larval development varies by and environmental conditions. Adults emerge from at water's edge. Mating occurs on the wing in many species.

Behavior

are capable fliers but generally weaker than dragonflies. Many mate on the wing. When at rest, most species fold wings together above the . Some species spend time in direct sunlight for , though shade-seeking has been observed to reduce energy expenditure.

Ecological Role

Important in both aquatic and terrestrial . Larvae control of mosquito larvae and other aquatic ; prey on flying insects. Serve as food for amphibians, fish (larvae), and terrestrial arthropods and vertebrates (adults). Used as bioindicators of environmental health due to sensitivity to water quality and degradation. Declines in populations can disrupt food webs and potentially increase mosquito-borne risk.

Human Relevance

Beneficial as of pest insects including mosquitoes. Subject of ecological research and conservation concern due to sensitivity to urbanization, water pollution, and degradation. Popular among naturalists and photographers. Featured in museum exhibits and educational programs.

Similar Taxa

  • AnisopteraDragonflies hold wings spread perpendicular to body at rest, have that meet dorsally, larger and more robust bodies, and stronger . Anisozygoptera is intermediate with ~3 holding wings partially spread.

More Details

Taxonomic Literature

Comprehensive identification guides include ' of the New World: An Illustrated and Annotated Key to the ' (Garrison 2010). -level classification includes Coenagrionidae, Calopterygidae, Platycnemididae, and Chlorocyphidae among others, though higher-level relationships remain under study.

Conservation Concern

Urbanization impacts documented: reduced vegetation increases time spent in direct sunlight and energy expenditure; wastewater effluents reduce water quality; combined effects decrease body condition, hatchability, and abundance.

Sources and further reading