Acromyrmex octospinosus
In 3 days ~20% in a week ~30%
Acromyrmex octospinosus is a species of New World ants of the subfamily Myrmicinae of the genus Acromyrmex. It is found in the wild naturally in Central America ranging from southern Mexico down to Panama; and across northern South America in Venezuela.
Foundresses of the leaf-cutting ant Acromyrmex octospinosus forage for leaves as garden substrate (semi-claustral foundation). The fungal pellet and substrate usually are attached to rootlets, which are used as a platform for the garden. This arrangement keeps the garden suspended away from the earthen chamber of the underground nest during early colony growth, and it serves to minimize contact between the garden and contaminants. A. octospinosus foundresses produce from 3 to 7 workers in 2.7 months after founding the nest, but workers do not forage for substrate at this time. Incipient nests died or were abandoned at a monthly rate of about 50%. The ants routinely clean their legs before manipulating the garden substrate. The foundresses use their fore-legs to rub the surface of the metapleural gland, and they then use typical grooming behaviors to pass the forelegs through the mouthparts, after which the ant then licks the garden substrate. Similarly, ants apparently use their mouths to transfer fecal droplets to their legs. These grooming behaviors are prophylactic behaviors that may help the foundress maintain a hygienic garden. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Main Ridge Forest Reserve | 🇹🇹 Trinidad and Tobago | |
| 2 | Arrecifes de Cozumel National Park | 🇲🇽 Mexico | |
| 3 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 4 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 5 | Tortuguero National Park | 🇨🇷 Costa Rica |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San José | 🇨🇷 Costa Rica | |
| 2 | Panama City | 🇵🇦 Panama |
With luck
About 10% of wildlife watchers report an Acromyrmex octospinosus sighting in San José on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 111th most-seen of the 239 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
February and May–October
In those months about 10% of wildlife watchers report an Acromyrmex octospinosus in San José on a given day, against under 5% in March–April and November–January, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Acromyrmex octospinosus sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 cities where we can rate Acromyrmex octospinosus sightings, San José has the highest daily chance: about 10%. Next come Panama City (Panama, about 10%).
Same family: Formicidae
The closest relatives of the Acromyrmex octospinosus that you can see in San José (family Formicidae, Ants) are Hairy-Headed Leafcutter Ant (about 30%), Shimmering Golden Sugar Ant (about 10%) and Tropical Carpenter Ant (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Acromyrmex octospinosus is recorded against all the insects logged in San José (14 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.
