Pheidole megacephala
In 3 days ~20% in a week ~50%
Pheidole megacephala is a species of ant in the subfamily Myrmicinae. It is commonly known as the big-headed ant in the US and the coastal brown ant in Australia. It is a very successful invasive species and is considered a danger to native ants in Australia and other places. It is regarded as one of the world's worst invasive ant species.
Pheidole megacephala was described from a specimen from the island of Mauritius by the entomologist Johan Christian Fabricius in 1793, although a 1775 record exists for Egypt, under the name Formica edax. Regardless of its African origin, big-headed ants have since spread to many tropical and subtropical parts of the world.
There are two castes (types) of worker ants, the major worker and the minor worker. The common name of bigheaded ant derives from the major worker's disproportionately large head. Major workers are not primarily involved in defence like soldiers of other ant species. They have thick and powerful mandibles which they use to crush seeds and cut up other larger pieces of food for the smaller and more numerous minor workers to transport back to the nest. The major workers are about four millimetres... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | iSimangaliso Wetland Park | 🇿🇦 South Africa | |
| 2 | Daintree National Park | 🇦🇺 Australia | |
| 3 | Garden Route National Park | 🇿🇦 South Africa | |
| 4 | Table Mountain National Park | 🇿🇦 South Africa |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Brisbane | 🇦🇺 Australia | |
| 2 | Perth | 🇦🇺 Australia | |
| 3 | Miami | 🇺🇸 United States | |
| 4 | Cape Town | 🇿🇦 South Africa | |
| 5 | Pretoria | 🇿🇦 South Africa | |
| 6 | Orlando | 🇺🇸 United States | |
| 7 | Sydney | 🇦🇺 Australia | |
| 8 | Auckland | 🇳🇿 New Zealand | |
| 9 | Paris | 🇫🇷 France | |
| 10 | San Diego | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report an African Big-Headed Ant sighting in Perth on a given day, based on 44 verified sightings from GBIF citizen-science data. It is the 53rd most-seen of the 275 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
September and November–July
In those months about 10% of wildlife watchers report an African Big-Headed Ant in Perth on a given day, against under 5% in August and October, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most African Big-Headed Ant sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 10 cities where we can rate African Big-Headed Ant sightings, Perth ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Brisbane (Australia, about 10%).
Same family: Formicidae
The closest relatives of the African Big-Headed Ant that you can see in Perth (family Formicidae, Ants) are Green-Head Ant (about 20%), Camponotus chalceus (about 10%) and Dolichoderus ypsilon (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the African Big-Headed Ant is recorded against all the insects logged in Perth (44 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.
