Cicindela fulgida

Adults may be distinguished from co-occurring saline habitat specialists by microhabitat preference: C. fulgida occupies drier, more vegetated fringes of salt flats, whereas Eunota togata globicollis prefers open areas and Ellipsoptera nevadica knausii occupies moister zones near water edges. Larval burrows are immediately recognizable by their turreted structure—no other U.S. tiger beetle constructs such elevated entrances. Burrows are nearly perfectly circular with smoothly beveled edges, ~5-6mm diameter for third instar larvae.

Strictly associated with saline habitats: dry, salt-encrusted clay soils, alkaline creek beds, and salt flat margins. Occupies the drier, sparsely vegetated transition zones between barren salt flats and surrounding grassland. Requires substrates with high salinity but lower moisture than closely related saline specialists. Larval burrows are constructed in white, salt-encrusted ground, often embedded within clumps of salt-tolerant vegetation.

North America: documented from northwestern Nebraska (Sioux County, Oglala National Grassland), northwestern Oklahoma (Salt Plains National Wildlife Refuge, Alfalfa County), and broadly across the Great Plains. GBIF records confirm presence in Canada and USA.

Adults active primarily in spring and fall; occurrence in summer is rare and likely represents stragglers rather than peak activity. This temporal pattern contrasts with summer-active saline specialists such as Ellipsoptera nevadica knausii and Habroscelimorpha circumpicta johnsonii, with which it co-occurs.

Larvae construct permanent burrows with distinctive turreted entrances, remaining at the burrow mouth to ambush passing prey. Third instar larvae spend the majority of their developmental period in these burrows, which become increasingly conspicuous. Pupation occurs within the burrow; adults emerge through the original burrow entrance.

Adults are fast-running, visually oriented predators typical of tiger beetles. They are easily alarmed in heat of day, requiring stalking approach for observation. Larvae are sit-and-wait ambush predators, oriented in fixed position at burrow entrance with sickle-shaped mandibles resting against the flattened lower edge of the opening. Larvae toss soil pellets with head movements to maintain burrow, creating directional debris fields.

Predator in saline flat ecosystems; larvae and adults contribute to regulation of small arthropod populations in these extreme environments. Niche partitioning with co-occurring tiger beetles is achieved through temporal separation (spring/fall vs. summer activity) and microhabitat specialization (vegetated fringes vs. open flats vs. moist margins).

Subject of ecological and behavioral research, particularly regarding larval burrow architecture and thermoregulatory adaptations. Occurs in protected areas including Salt Plains National Wildlife Refuge, where it contributes to local biodiversity value. No documented economic importance.

• Cicindela tranquebarica kirbyiCo-occurs in saline habitats and active in same seasons, but occupies broader range of substrates including non-saline clays and sands; larvae construct simple non-turreted burrows; adults are larger with more robust build.
• Eunota togata globicollisShares saline flat habitat and spring/fall activity period, but prefers open, barren salt surfaces rather than vegetated fringes; lacks crimson coloration; larvae construct simple burrows without turrets.
• Ellipsoptera nevadica knausiiOverlaps in saline habitat but is summer-active rather than spring/fall; requires moister conditions near water edges; larvae do not build turreted burrows.

• tiger beetle
• saline habitat specialist
• turreted burrow
• Great Plains fauna
• thermoregulatory adaptation

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Kirby’s Tiger Beetle | Beetles In The Bush
• Tigers in the Nebraska Badlands | Beetles In The Bush
• salt flats | Beetles In The Bush
• Diversity in Tiger Beetle Larval Burrows | Beetles In The Bush
• A hunting we will go! | Beetles In The Bush
• owl-flies | Beetles In The Bush