Valanga nigricornis
In 3 days ~60% in a week ~90%
Valanga nigricornis, the Javanese grasshopper (also known as the Javanese bird grasshopper), is a species of grasshopper in the subfamily Cyrtacanthacridinae of the family Acrididae. It is found in southeastern Asia, the type location being Singapore. It was first described by the German zoologist Hermann Burmeister in 1838. There are more than twenty subspecies, most of which are endemic to different island groups; the subspecies V. nigricornis nigricornis is the type for the genus Valanga.
There is considerable sexual dimorphism in this species with the males measuring 45 to 55 millimetres (1+3⁄4 to 2+1⁄8 in) in length and the females 15 to 75 mm (5⁄8 to 3 in). The adults are yellowish-brown, yellowish or green with bluish-black markings. The hind wings, which are visible in flight, are rose red. The nymphs are pale green with dark markings.
The Javanese grasshopper is native to Brunei, Cambodia, Indonesia, Malaysia, Papua New Guinea, the Philippines, Singapore, the Solomon Islands, Thailand, and Vietnam. It is mainly a woodland species and is found in forest clearings, on trees and shrubs. It can be a serious pest in oil palm and rubber plantations... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Raja Ampat | 🇮🇩 Indonesia | |
| 2 | Kinabalu Park | 🇲🇾 Malaysia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yogyakarta | 🇮🇩 Indonesia | |
| 2 | Tasikmalaya | 🇮🇩 Indonesia | |
| 3 | Johor Bahru | 🇲🇾 Malaysia | |
| 4 | Kuala Lumpur | 🇲🇾 Malaysia | |
| 5 | Jakarta | 🇮🇩 Indonesia | |
| 6 | Singapore | 🇸🇬 Singapore | |
| 7 | Semarang | 🇮🇩 Indonesia | |
| 8 | Surakarta | 🇮🇩 Indonesia | |
| 9 | Denpasar | 🇮🇩 Indonesia | |
| 10 | Kuching | 🇲🇾 Malaysia |
Possible
About 20% of wildlife watchers report a Javanese Grasshopper sighting in Singapore on a given day, based on 1,141 verified sightings from GBIF citizen-science data. It is the 12th most-seen of the 1045 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
September–October and December–January
In those months about 30% of wildlife watchers report a Javanese Grasshopper in Singapore on a given day, against about 20% in February–August and November, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Javanese Grasshopper sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
6th of 12
Of the 12 cities where we can rate Javanese Grasshopper sightings, Singapore ranks 6th at about 20%. The best odds are in Yogyakarta (Indonesia, about 40%), Tasikmalaya (Indonesia, about 40%) and Johor Bahru (Malaysia, about 30%).
Same family: Acrididae
The closest relatives of the Javanese Grasshopper that you can see in Singapore (family Acrididae, Short-horned Grasshoppers) are Rufous-Legged Grasshopper (about 30%), Traulia azureipennis (about 10%) and Short-Winged Rice Grasshopper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Javanese Grasshopper is recorded against all the insects logged in Singapore (1,141 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.
