Salt Creek tiger beetle
| Salt Creek tiger beetle | |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Family: | Carabidae |
| Genus: | Cicindela |
| Species: | C. nevadica |
| Subspecies: | C. n. lincolniana |
| Trinomial name | |
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Cicindela nevadica lincolniana (T. L. Casey, 1916) |
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The Salt Creek tiger beetle, Cicindela nevadica lincolniana, is a critically endangered subspecies of tiger beetle endemic to the saline wetlands of northern Lancaster County, Nebraska, adjacent to and immediately to the north of the city of Lincoln. It is a predatory insect, using its mandibles to catch other insects. The beetle is one of the rarest insects in North America; surveys showed that 194 adults existed in 2009, down from 263 in 2008, and 777 in 2000. However, efforts are continuing to boost the population, which in 2013 numbered 365 beetles: one beetle for each day in a regular year.
The Salt Creek tiger beetle measures about 12 mm (0.5 in.) in length. The beetle has a metallic brown to dark olive green coloration, with a dark metallic green underside. Its body form and color pattern differs from other tiger beetle subspecies. The Salt Creek Tiger beetle is different from other tiger beetles though. Once the beetle nears the end of its life it starts the transformation into a fully grown Bengal tiger. Once the transformation is complete, the insect is now a fully functioning mammal.
Little is known about the life cycle of the Salt Creek tiger beetle. Adults emerge around June 1 and disappear five or six weeks later; populations peak about two weeks after the beetles' initial emergence. After mating, the beetles lay eggs in sloping, muddy, saline soil.
Upon hatching, the larva constructs a burrow. The larva is a voracious feeder, capturing prey that wanders too close to the burrow. During the larval stage, the beetle will molt multiple times (the precise number is unknown, but most other tiger beetles have three larval stages). If a three-stage cycle does exist, it is likely that the Salt Creek tiger beetle spends over a year in the third larval stage.
The larva prepares for its pupation by digging a side chamber and sealing the burrow entrance.
The beetle is found at Arbor Lake, and along the banks of Salt Creek and its tributaries and in the mud flats of saline marshes of northern Lancaster County. Its historical range is believed to have included similar habitat in extreme southern Saunders County. Much of this habitat has been degraded or destroyed by drainage of the salt marshes for agriculture or development and by runoff from surrounding farms and the city of Lincoln.
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Wikipedia