Arigomphus cornutus
In 3 days ~10% in a week ~20%
The horned clubtail (Arigomphus cornutus) is a clubtail dragonfly of Canada and the United States. The horned clubtail is 2.2 inches (56 mm) long and lacks an abdominal club. It has a greenish thorax with black stripes and a black abdomen with a light stripe along the top. It has blue eyes and black legs. It also has distinctive wide forked yellow claspers shaped like cow horns and a large sloped bridge between the eyes.
The horned clubtail lives in ponds and sluggish streams. Its range includes Canada and several U.S. states: Colorado Iowa Minnesota Montana – Carter, Custer, Fallon, Powder River, and Wibaux Counties; only in artificial reservoirs.
Nebraska – Cherry and Cuming Counties New York – (rarely) North Dakota South Dakota Wisconsin Wyoming Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montreal | 🇨🇦 Canada | |
| 2 | Minneapolis [Saint Paul] | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Horned Clubtail sighting in Minneapolis [Saint Paul] on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 546th most-seen of the 672 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Horned Clubtail in Minneapolis [Saint Paul] on a given day, so our monthly data shows no clear season.
Among the best
Of the 2 cities where we can rate Horned Clubtail sightings, Minneapolis [Saint Paul] ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Montreal (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Horned Clubtail is recorded against all the insects logged in Minneapolis [Saint Paul] (6 verified sightings), 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.
