Tramea basilaris
In 3 days ~20% in a week ~40%
Tramea basilaris, also known as the keyhole glider, red marsh trotter, or wheeling glider, is a species of dragonfly in the family Libellulidae. It is found throughout most of Africa, Arabia and in Asia. Capable of very long migration and nomadic flight, it reached Europe once, with a pair being recorded at the island of Linosa, Sicily (Italy) in 2016. Similarly, this species is able to use the trade winds to reach the Caribbean and South Americas, where it has been spotted in Bonaire, Venezuela, and Martinique.
It is a medium-sized red dragonfly with extremely long anal appendages. It can be distinguished from other species of this genus by the two brownish black hind-wing patch surrounded by a golden yellow areola in the base. Female is similar to male; but yellowish in color.
This species is found at pools, ponds, marshes, lakes and water tanks. Typical reproducing habitats are grassy marshes and ponds, but this species may be found anywhere during migrations. They are seen in tireless soaring flight in sunny days, sometimes in conspecific groups or in mixed groups of other soaring dragonflies like Pantala flavescens or Hydrobasileus croceus. It perches... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | iSimangaliso Wetland Park | 🇿🇦 South Africa | |
| 2 | Kruger National Park | 🇿🇦 South Africa |
With luck
About 10% of wildlife watchers report a Keyhole Glider sighting in Chennai on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 188th most-seen of the 376 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
November
In that month about 20% of wildlife watchers report a Keyhole Glider in Chennai on a given day, against under 5% in January–February, April and July–October, the lowest months. That is one of Chennai's wettest months, with about 290 mm of rain against 5 mm in February.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Keyhole Glider sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 3 cities where we can rate Keyhole Glider sightings, Chennai ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Hyderabad (India, about 10%).
GBIF citizen-science records
It is estimated from how often the Keyhole Glider is recorded against all the insects logged in Chennai (14 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.
