Chrysops dispar
In 3 days ~10% in a week ~20%
Chrysops dispar is a species of horsefly found widely distributed in the Indo-Malayan realm. Females feed on blood prior to laying eggs. The species is differentiated from others in the genus by the patterning of black on the abdomen segments and the dark patterning of the wings. There may however be cryptic species within the wide distribution range from India to Southeast Asia (crossing Weber's Line to Maluku).
Chrysops dispar has an inverted v-mark on the abdomen that extends to the 3, 4th, and later abdominal segments. The scutellum is brown and the hind femora and tibiae are dark in some specimens. The females have the eyes separated on the front by a tomentose strip with a bare oval to spherical frontal callus. The eyes are green or golden with purple bands and spots in life. The male has the compound eyes contiguous (touching each other). The maxillary palps are shorter and slenderer in males. This species can transmit livestock diseases such as those caused by Trypanosoma evansi and Pasteurella multocida. Although morphologically identified and with a large distribution range, the species shows high sequence diversity within populations. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kochi | 🇮🇳 India |
Rare
Under 5% of wildlife watchers report a Chrysops dispar sighting in Kochi on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 377th most-seen of the 428 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.
March, May, October and December
In those months about 10% of wildlife watchers report a Chrysops dispar in Kochi on a given day, against under 5% in January–February, April, June–September and November, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Chrysops dispar sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Kochi, in our data
Kochi is the only city on Wallace's Line with enough records to rate Chrysops dispar sightings: under 5% of wildlife watchers there report one on a given day.
Same order: Diptera
The closest relatives of the Chrysops dispar that you can see in Kochi (order Diptera, Flies) are Black Soldier Fly (about 20%), Bathroom Moth Fly (about 10%) and Mimegralla splendens (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chrysops dispar is recorded against all the insects logged in Kochi (5 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.
