Brachymesia furcata
In 3 days ~10% in a week ~20%
Brachymesia furcata, commonly known as the red-tailed pennant, is part of the dragonfly order Odonata. It is a species of skimmer belonging to Libellulidae, one of the largest dragonfly families in the world. Along with Brachymesia gravida and B. herbida, two closely related species within the same genus, B. furcata is often found in semi-aquatic habitats distributed throughout the Caribbean, the Americas, Argentina, West India, Mexico, and Puerto Rico. Current populations of B. furcata are stable. The IUCN conservation status of B. furcata designates the species as "least concern" as last reviewed in 2017.
Similar to other dragonflies, B. furcata has a life cycle consisting of three primary stages: egg, nymph, and adult. Its eggs are laid in still-water conditions on submerged aquatic plants or directly into the water depending on the environmental conditions. Marshes, ponds, lakes, and other mildly saline aquatic habitats are all potential locations for dragonflies to colonize. Bottom debris and aquatic vegetation provide both sustenance as well as hiding spots for the newly hatched dragonfly nymphs. After undergoing a few molts, the nymph transitions... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cerro Azul Meámbar National Park | 🇭🇳 Honduras | |
| 2 | Lago de Yojoa | 🇭🇳 Honduras | |
| 3 | Soberanía National Park | 🇵🇦 Panama | |
| 4 | Manu National Park | 🇵🇪 Peru |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Santo Domingo | 🇩🇴 Dominican Republic | |
| 2 | Mesa | 🇺🇸 United States | |
| 3 | Lima | 🇵🇪 Peru | |
| 4 | Phoenix | 🇺🇸 United States | |
| 5 | Austin | 🇺🇸 United States | |
| 6 | Vitória | 🇧🇷 Brazil | |
| 7 | Buenos Aires | 🇦🇷 Argentina | |
| 8 | Houston | 🇺🇸 United States | |
| 9 | Los Angeles | 🇺🇸 United States | |
| 10 | San Diego | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Red-Tailed Pennant sighting in São Paulo on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 473rd most-seen of the 832 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.
January
In that month about 10% of wildlife watchers report a Red-Tailed Pennant in São Paulo on a given day, against under 5% in February to December, the lowest months. That is one of São Paulo's wettest months, with about 230 mm of rain against 35 mm in August.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Red-Tailed Pennant sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
12th of 13
Of the 13 cities where we can rate Red-Tailed Pennant sightings, São Paulo ranks 12th at under 5%. The best odds are in Santo Domingo (Dominican Republic, about 20%), Mesa (United States, about 20%) and Lima (Peru, about 10%).
GBIF citizen-science records
It is estimated from how often the Red-Tailed Pennant is recorded against all the insects logged in São Paulo (11 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.
