Brachymesia furcata
In 3 days ~10% in a week ~30%
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 Buenos Aires on a given day, based on 58 verified sightings from GBIF citizen-science data. It is the 180th most-seen of the 558 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
December to February
In those months about 10% of wildlife watchers report a Red-Tailed Pennant in Buenos Aires on a given day, against under 5% in March to November, the lowest months.
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.
7th of 13
Of the 13 cities where we can rate Red-Tailed Pennant sightings, Buenos Aires ranks 7th at under 5%. The best odds are in Santo Domingo (Dominican Republic, about 20%), Mesa (United States, about 20%) and Lima (Peru, about 10%).
Same family: Libellulidae
The closest relatives of the Red-Tailed Pennant that you can see in Buenos Aires (family Libellulidae, Skimmers) are Erythrodiplax nigricans (about 10%), Orthemis nodiplaga (about 10%) and Pin-Tailed Pondhawk (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Red-Tailed Pennant is recorded against all the insects logged in Buenos Aires (58 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.
