Argia apicalis

(Say, 1840)

Blue-fronted Dancer

Argia apicalis, commonly known as the -fronted Dancer, is a of in the to North America. First described by Thomas Say in 1840, it is a common and widespread species assessed as Least Concern by the IUCN. The species exhibits notable color , with males occurring in bright blue and gray-black phases and females in , turquoise, and gray-black phases. Color changes are multi-directional and not tied to age or mating status. Males use thoracic color patterns for sex recognition, with brown females eliciting the strongest sexual response. The species shows distinctive geographical variation in thoracic stripe patterns, with broad-striped forms in the southeastern United States and typical forms elsewhere.

Argia apicalis by the Smithsonian. Used under a CC0 license.

90 Argia apicalis wing by Philip Garmen. Used under a Public domain license.

151 152 Argia apicalis, male by Philip Garmen. Used under a Public domain license.

Pronunciation

How to pronounce Argia apicalis: /ˈaɹdʒiə ˌæpɪˈkeɪlɪs/

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

Identification

Males distinguished by -tipped , though this feature aids but is not indispensable for sex recognition. Two major geographical variants: broad-striped form with wide, full-length stripe and well-developed thoracic stripe in females, versus typical form with reduced pattern. Southeastern show larger black areas on of and on male eighth and ninth abdominal . in coloration: males bright blue or gray-black, females , turquoise, or gray-black.

Images

Habitat

River systems; primarily associated with running water . In southeastern portion of range, colonies are restricted to river systems with notable absence from lakes, ponds, smaller streams, and river headwaters.

Distribution

North America including Middle America; widespread across eastern and central United States. Southeastern margin of distribution characterized by isolated broad-striped groups in southeast Georgia and northern Florida. Typical form occurs west and north of this region. One known intergradation zone between typical and broad-striped populations.

Seasonality

Summer with of diverse age structure; maximum activity near noon.

Behavior

Males occur in two color phases (bright , gray-black), females in three (, turquoise, gray-black). Color change is multi-directional with up to eight transitions in 12 days; dark phase is more temporary. No color phase correlates with age or mating status. Males arrive at water earlier than females and space themselves at approximately six-foot intervals, maintaining these areas through aggressive non-sexual activity that wards off 87% of intruders. Males recognize sex and seize females immediately upon arrival without courtship or display. Males discriminate intact females from males using thoracic color, responding more sexually to brown females than other colors. Copulation lasts approximately 16 minutes and occurs away from male concentration areas. is gregarious at communal sites including willow roots, boards, sticks, and horizontal Helenium. Oviposition consists of three phases: exploration (25 min), tandem oviposition (65 min), and solitary oviposition (21 min). Females avoid second matings on same day through rapid escape .

Similar Taxa

Argia moestaSimilar and preferences; Powdered Dancer shows mature males that could be confused with gray-black phase of A. apicalis
Other Argia species Argia is speciose with many similar-sized ; A. apicalis distinguished by specific thoracic stripe patterns and blue-tipped