Lestes rectangularis

Say, 1840

slender spreadwing

Lestes rectangularis, commonly known as the slender spreadwing, is a in the Lestidae. It is native to eastern North America, ranging from eastern Canada through the eastern United States. The species is characterized by its elongated, slender body form and distinctive wing posture at rest, with wings held partially spread rather than folded together above the . It inhabits springs and temporary pond , where it completes its aquatic larval development before emerging as a flying .

Lestes rectangularis by the Smithsonian. Used under a CC0 license.115 Lestes rectangularis. female, by Philip Garmen. Used under a Public domain license.Slender Spreadwing Lestes rectangularis by Mike Ostrowski from North Bethesda, Maryland, USA. Used under a CC BY-SA 2.0 license.

Pronunciation

How to pronounce Lestes rectangularis: //ˈlɛstiːz rɛˌktæŋˈɡjʊlərɪs//

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Identification

Distinguished from other Lestes by the combination of slender body form, black body with pale blue , and yellow-edged wings. The female's larger size and paler yellow wing edges provide additional diagnostic characters. The species' eastern North American distribution helps separate it from western . Wing venation and abdominal segment proportions may provide further distinguishing features, though specific characters require close examination.

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Appearance

Elongated, slender body with black coloration and pale blue . Wings have yellow edges. Females are larger than males and display paler yellow wing coloration. The exhibits the characteristic spreadwing posture, with wings held at an angle away from the body when at rest rather than folded together above the .

Habitat

Inhabits springs and drying ponds. Associated with shallow, vegetated freshwater that may be temporary or seasonal in nature. The shows adaptability to habitats with fluctuating water levels.

Distribution

Native to eastern North America, including eastern Canada and the eastern United States. Records confirm presence in Vermont and broader eastern North American range.

Life Cycle

Aquatic larval stage (naiad) develops in freshwater before emerging as a winged . Specific details of deposition, larval duration, and timing are not documented in available sources.

Behavior

hold wings in partially spread posture when at rest, a characteristic of the Lestidae. This distinguishes them from most , which fold wings together above the .

Ecological Role

Predatory both as aquatic naiads and as aerial . Naiads consume aquatic ; adults capture small flying insects. Serves as prey for various aquatic and terrestrial including fish, birds, and other insects.

Human Relevance

Subject of ecological research, particularly regarding seasonal regulation of . Observed by naturalists and enthusiasts in its native range.

Similar Taxa

  • Other Lestes speciesShare spreadwing wing posture and general body form; distinguished by specific coloration, size, and geographic distribution
  • Other damselfly families (e.g., Coenagrionidae)Overlap in and general appearance; distinguished by wing posture at rest—Lestidae hold wings spread, while most other fold wings together above

More Details

Research interest

The has been subject of ecological research regarding seasonal regulation of its , as indicated by a 1939 journal publication.

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Sources and further reading