Amblycheila picolominii
Reiche, 1840
Plateau Giant Tiger Beetle
Amblycheila picolominii is a large, in the Amblycheila. First described in 1840, it inhabits rocky, gypsum and red siltstone slopes and ravines in the southwestern United States. The is active at night and has been observed on steep rocky terrain and canyon floors. It is one of the largest tiger beetles in North America and is sought after by .
Pronunciation
How to pronounce Amblycheila picolominii: /ˌæmblɪˈkaɪlə ˌpikoʊloʊˈmiːni.aɪ/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from other Amblycheila by geographic range and preference. A. cylindriformis (Great Plains giant ) occurs further north and east in plains habitats, while A. picolominii is associated with plateau and canyon environments in New Mexico and adjacent areas. The species is , whereas many similar-sized tiger beetles are . Confirmed identification requires examination of specific morphological characters not detailed in general sources.
Appearance
Large-bodied with a build typical of the Amblycheila. Specific coloration and pattern details are not documented in available sources, though the genus is characterized by large size relative to other tiger beetles. The are hardened covering the . As with other tiger beetles, it possesses large, prominent adapted for vision and long, slender legs for rapid running.
Habitat
Rocky slopes and canyon ravines composed of gypsum and red siltstone. Found in saltbush/mesquite chaparral vegetation zones below rocky escarpments. The occupies steep, narrow ravines and canyon floors with exposed rock surfaces. includes juniper/oak/pinyon woodland at higher elevations and mesquite chaparral at lower elevations.
Distribution
Southwestern United States, primarily in New Mexico. Documented from Bottomless Lakes State Park (Chaves County), Guadalupe Mountains National Park area (Eddy County/Culberson County), and Organ Mountains-Desert Peaks National Monument (Doña Ana County). The occurs on the Colorado Plateau and adjacent mountain ranges.
Seasonality
active from late spring through early fall. Observations span June through September, with peak activity likely during summer months. activity occurs throughout the active season.
Behavior
Strictly . walk actively on rocky terrain at night, traversing steep slopes and canyon bottoms. Has been observed on roads through woodland at dusk and after dark. Individuals move with a characteristic rapid, scurrying gait typical of . When disturbed, they may seek shelter in rock crevices or vegetation. The does not readily when approached, relying instead on running to escape.
Human Relevance
Sought after by due to its large size and habits, which make it a challenging to encounter. The species has been documented through citizen science platforms including iNaturalist. Its presence indicates intact rocky canyon with minimal disturbance.
Similar Taxa
- Amblycheila cylindriformisSimilar large size and habits, but occurs in plains of Oklahoma and Kansas rather than rocky plateau terrain; has more cylindrical body form
- Cicindelidia punctulataSimilar geographic range but much smaller, , and occurs in open sandy or clay rather than rocky slopes
- Cicindelidia obsoletaLarge size but , active in grassland rather than rocky canyons
More Details
Discovery and taxonomy
First described by Reiche in 1840, making it one of the earlier described in the . The specific epithet 'picolominii' honors an individual, though the exact derivation is not documented in available sources.
Collection challenges
The ' habits and preference for steep, rocky terrain make it difficult to observe and collect. Successful encounters typically require night hiking with headlamps in appropriate , often in remote canyon locations.
Conservation status
Not formally assessed by authorities, but likely vulnerable due to restricted requirements and potential threats from recreational development in canyon environments.