Onychogomphus uncatus
In 3 days ~20% in a week ~40%
Onychogomphus uncatus, the large pincertail or blue-eyed hook-tailed dragonfly, is a species of dragonflies belonging to the family Gomphidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Mercantour National Park | 🇫🇷 France | |
| 3 | Pyrénées National Park | 🇫🇷 France | |
| 4 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Porto | 🇵🇹 Portugal |
With luck
About 10% of wildlife watchers report a Large Pincertail sighting in Porto on a given day, based on 26 verified sightings from GBIF citizen-science data. It is the 211th most-seen of the 498 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.
June to August
In those months about 10% of wildlife watchers report a Large Pincertail in Porto on a given day, against under 5% in September to May, the lowest months. Those are among Porto's driest months, with about 20 mm of rain a month against 140 mm in January.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Large Pincertail sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Porto, in our data
Porto is the only city on Wallace's Line with enough records to rate Large Pincertail sightings: about 10% of wildlife watchers there report one on a given day.
Same order: Odonata
The closest relatives of the Large Pincertail that you can see in Porto (order Odonata, Dragonflies and Damselflies) are Copper Demoiselle (about 10%), Keeled Skimmer (about 10%) and Large Red Damselfly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Large Pincertail is recorded against all the insects logged in Porto (26 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.
