Perithemis

Hagen, 1861

Amberwings

Perithemis is a of small in the , commonly known as amberwings. Males are distinguished by their amber-colored . The genus includes approximately 12 described distributed in the New World, with notable species including the Eastern Amberwing (P. tenera) and the Mexican Amberwing (P. intensa).

Perithemis tenera by (c) mayfly1963, some rights reserved (CC BY), uploaded by mayfly1963. Used under a CC-BY license.

Perithemis by (c) Healthy Yards, some rights reserved (CC BY), uploaded by Healthy Yards. Used under a CC-BY license.

Perithemis by no rights reserved, uploaded by Brady Reed. Used under a CC0 license.

Pronunciation

How to pronounce Perithemis: //pɛˈraɪθɛmɪs//

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Identification

Distinguished from other small libellulid by the amber coloration in males. The Eastern Amberwing (P. tenera) is one of the smallest dragonflies in eastern North America and can be confused with due to its coloration and pattern. Separated from similar like Nannothemis by wing shape and details.

Images

Appearance

Small-bodied with relatively broad . Males possess distinctive amber or orange-tinged wings, the characteristic that gives the group its . Females typically have clearer wings with or amber markings. Body coloration varies by , often with patterned . follows typical libellulid pattern with and present.

Habitat

Associated with standing or slow-moving freshwater including ponds, marshes, and lakeshores. Males establish territories at favorable sites. Specific microhabitat preferences vary by .

Distribution

New World distribution ranging from the United States through Central America to South America. Individual have more restricted ranges: P. tenera in eastern North America, P. intensa in the southwestern United States and Mexico, P. domitia in the southern United States and tropics.

Seasonality

Active during warmer months; specific periods vary by and latitude. In temperate regions, typically observed from late spring through summer.

Life Cycle

development with , (), and stages. Aquatic nymphs inhabit freshwater environments. Specific details of egg-laying and nymphal development vary by .

Behavior

Males are strongly territorial, establishing and defending sites at favorable locations. Territorial defense involves display and physical combat including grappling and chasing. Prior residency provides significant advantage in contests, with residents winning approximately 75% of fights. Contest duration increases when opponents are more similar in size. In P. mooma, males exhibit the 'Dear Enemy Effect'—recognizing neighbors and showing reduced aggression toward them compared to unfamiliar intruders.

Ecological Role

are aerial of small flying . are aquatic predators feeding on and small aquatic organisms. Contribute to between aquatic and terrestrial .

Human Relevance

Subject of ecological and behavioral research, particularly regarding territoriality and mating systems. Some serve as indicators of wetland health. Eastern Amberwing is among the most commonly observed in its range due to its of disturbed .

Similar Taxa

NannothemisAlso contains small ; separated by and body proportions
SympetrumSimilar size and use; lacks amber coloration, has different wing shape
PachydiplaxSmall libellulids with banded ; body coloration distinguishes males

More Details

Behavioral Research

Perithemis have been extensively studied for territorial . Research on P. tenera demonstrated prior residency advantage in territorial contests. Studies of P. mooma documented the 'Dear Enemy Effect'—a phenomenon where territorial males recognize and respond less aggressively to established neighbors than to unfamiliar intruders, conserving energy for more threatening interactions.

Size Range

Among the smallest in North America. P. tenera and Nannothemis bella are noted as some of the smallest dragonfly in the eastern United States.