Diacamma rugosum
In 3 days ~10% in a week ~20%
Diacamma rugosum, also known as the Bornean queenless ant or Asian bullet ant, is a species of ant of the subfamily Ponerinae. It is found in many countries throughout Southeast Asia. 20 subspecies are recognized. Diacamma rugosum is noted for being one of the only species of ants to completely lack a queen caste. Reproduction is done entirely by workers, with all workers being fertile upon birth. However, reproduction is kept strictly under control in the nest, with only one dominant female, or gamergate, laying all of the eggs. The gamergate will render workers sterile by mutilating their vestigial wing buds as soon as they pupate. These infertile workers, called callows, will remain loyal to the present gamergate and allow her to exercise control over the rest of the workers. This works to reduce colony infighting as it makes usurpation virtually impossible, and the only time the gamergate is replaced is if she dies naturally. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Colombo [Sri Jayawardenepura Kotte] | 🇱🇰 Sri Lanka | |
| 2 | Zhuhai [Macau] | 🇨🇳 China | |
| 3 | Kochi | 🇮🇳 India | |
| 4 | Jakarta | 🇮🇩 Indonesia | |
| 5 | Hong Kong | 🇨🇳 China | |
| 6 | Guangzhou | 🇨🇳 China | |
| 7 | Singapore | 🇸🇬 Singapore |
Rare
Under 5% of wildlife watchers report a Bornean Queenless Ant sighting in Singapore on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 684th most-seen of the 1045 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Bornean Queenless Ant in Singapore on a given day, so our monthly data shows no clear season.
7th of 7
Of the 7 cities where we can rate Bornean Queenless Ant sightings, Singapore ranks 7th at under 5%. The best odds are in Colombo [Sri Jayawardenepura Kotte] (Sri Lanka, about 10%), Zhuhai [Macau] (China, about 10%) and Kochi (India, about 10%).
GBIF citizen-science records
It is estimated from how often the Bornean Queenless Ant is recorded against all the insects logged in Singapore (12 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.
