Archilestes grandis
In 3 days ~30% in a week ~50%
The great spreadwing (Archilestes grandis) is a damselfly in the family Lestidae. When great spreadwings are startled they often return to the same perch or a perch nearby. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States | |
| 2 | Zion National Park | 🇺🇸 United States | |
| 3 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 4 | Big Bend National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Denver | 🇺🇸 United States | |
| 2 | San José | 🇨🇷 Costa Rica | |
| 3 | Dallas | 🇺🇸 United States | |
| 4 | Salt Lake City | 🇺🇸 United States | |
| 5 | San Salvador | 🇸🇻 El Salvador | |
| 6 | Austin | 🇺🇸 United States | |
| 7 | Baltimore | 🇺🇸 United States | |
| 8 | Guadalajara | 🇲🇽 México | |
| 9 | Washington | 🇺🇸 United States | |
| 10 | Monterrey | 🇲🇽 México |
With luck
About 10% of wildlife watchers report a Great Spreadwing sighting in San José on a given day, based on 42 verified sightings from GBIF citizen-science data. It is the 38th most-seen of the 239 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
February
In that month about 20% of wildlife watchers report a Great Spreadwing in San José on a given day, against about 10% in March to January, the lowest months. That is one of San José's driest months, with about 20 mm of rain against 300 mm in October.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Great Spreadwing sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 13
Of the 13 cities where we can rate Great Spreadwing sightings, San José ranks 2nd at about 10%. The best odds are in Denver (United States, about 20%).
Same order: Odonata
The closest relatives of the Great Spreadwing that you can see in San José (order Odonata, Dragonflies and Damselflies) are Cerulean Dancer (about 20%), Thorn-Tipped Dancer (about 10%) and Black-Winged Dragonlet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Great Spreadwing is recorded against all the insects logged in San José (42 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.
