Cordulegaster bilineata
In 3 days ~10% in a week ~30%
Zoraena bilineata, the brown spiketail, is a species of spiketail in the dragonfly family Cordulegastridae. It is found in North America. The IUCN conservation status of Zoraena bilineata is "LC", least concern, with no immediate threat to the species' survival. The population is stable. The IUCN status was reviewed in 2017. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Congaree National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 3 | Shenandoah National Park | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Brown Spiketail sighting in Shenandoah National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 630th most-seen of the 723 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May
In that month about 10% of wildlife watchers report a Brown Spiketail in Shenandoah National Park on a given day, against under 5% in June to April, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Brown Spiketail sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 3
Of the 3 parks where we can rate Brown Spiketail sightings, Shenandoah National Park ranks 3rd at under 5%. The best odds are in Congaree National Park (United States, about 10%) and Great Smoky Mountains National Park (United States, about 10%).
Same order: Odonata
The closest relatives of the Brown Spiketail that you can see in Shenandoah National Park (order Odonata, Dragonflies and Damselflies) are Ebony Jewelwing (about 10%), Common Whitetail (about 10%) and Widow Skimmer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Brown Spiketail is recorded against all the insects logged in Shenandoah National Park (5 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
