Potamarcha congener
In 3 days ~80% in a week >90%
Potamarcha congener is also known as the yellow-tailed ashy skimmer, common chaser, or swampwatcher. It is a species of dragonfly in the family Libellulidae, and was first described by Jules Pierre Rambur in 1842, almost fifty years before Ferdinand Karsch described its genus. Potamarcha congener is one of two species making up the genus Potamarcha, together with Potamarcha puella.
Potamarcha congener is common through much of its range, which stretches through parts of South Asia, South-East Asia, and Oceania, including in countries such as India, Indonesia, China, Australia, and Vietnam. Owing to its wide distribution, the species has been classified as Least Concern by the International Union for Conservation of Nature.
Potamarcha congener is a medium-sized dragonfly with a bluish black thorax and yellow tail with black markings. Face is olivaceous yellow to steel black or brown. Eyes are reddish brown above and bluish grey below. In male adults, the thorax and first four segments of the abdomen are covered with bluish pruinescence. In young adults, yellow markings are visible through the pruinescence. The rest of the abdomen is... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mudumalai National Park | 🇮🇳 India | |
| 2 | Kanha National Park | 🇮🇳 India | |
| 3 | Minneriya National Park | 🇱🇰 Sri Lanka | |
| 4 | Khao Yai National Park | 🇹🇭 Thailand | |
| 5 | Kaeng Krachan National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yogyakarta | 🇮🇩 Indonesia | |
| 2 | Raipur | 🇮🇳 India | |
| 3 | Nagpur | 🇮🇳 India | |
| 4 | Dhaka | 🇧🇩 Bangladesh | |
| 5 | Jakarta | 🇮🇩 Indonesia | |
| 6 | Kolkata | 🇮🇳 India | |
| 7 | Hyderabad | 🇮🇳 India | |
| 8 | Prayagraj | 🇮🇳 India | |
| 9 | Denpasar | 🇮🇩 Indonesia | |
| 10 | Tasikmalaya | 🇮🇩 Indonesia |
Likely
About 40% of wildlife watchers report a Swampwatcher sighting in Yogyakarta on a given day, based on 69 verified sightings from GBIF citizen-science data. It is the 6th most-seen of the 141 insects we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
March
In that month about 70% of wildlife watchers report a Swampwatcher in Yogyakarta on a given day, against under 5% in September and December, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Swampwatcher sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 28 cities where we can rate Swampwatcher sightings, Yogyakarta has the highest daily chance: about 40%. Next come Raipur (India, about 30%) and Nagpur (India, about 20%).
Same family: Libellulidae
The closest relatives of the Swampwatcher that you can see in Yogyakarta (family Libellulidae, Skimmers) are Slender Skimmer (about 60%), Ditch Jewel (about 50%) and Straight-Edge Red Parasol (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Swampwatcher is recorded against all the insects logged in Yogyakarta (69 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.
