Danaus erippus
In 3 days ~60% in a week ~90%
Danaus erippus, the southern monarch, is a milkweed butterfly (subfamily Danainae) in the family Nymphalidae. It is one of the best known butterflies in South America. Its genome is nearly identical to D. plexippus, but the two are incompatible, and therefore considered separate species.
Danaus erippus is included with other Nymphalidae, the largest family of butterflies with about 6000 species distributed throughout most of the world. It has a reduced pair of forelegs, is brightly coloured, and is included with popular species such as the emperors, admirals, tortoiseshells, and fritillaries. Its wingspan reaches about 110 millimetres (4.3 in), with an easily recognizable orange and black pattern. Until 2007, this butterfly was treated as a subspecies of Danaus plexippus. These species are very similar, but D. erippus usually has an orange trailing edge of the forewings, while in D. plexippus it is black. The lineages of the two species are thought to have separated about 2 million years ago. The colour of the wings in males of the southern monarch is paler than in the females.
Though, not as well known as the eastern North American monarch migratory... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | El Palmar National Park | 🇦🇷 Argentina | |
| 2 | Iberá National Park | 🇦🇷 Argentina |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cochabamba | 🇧🇴 Bolivia | |
| 2 | Rosario | 🇦🇷 Argentina | |
| 3 | Buenos Aires | 🇦🇷 Argentina | |
| 4 | São Luís | 🇧🇷 Brazil | |
| 5 | Montevideo | 🇺🇾 Uruguay | |
| 6 | Fortaleza | 🇧🇷 Brazil | |
| 7 | Porto Alegre | 🇧🇷 Brazil | |
| 8 | Santa Cruz de la Sierra | 🇧🇴 Bolivia | |
| 9 | Curitiba | 🇧🇷 Brazil | |
| 10 | Belém | 🇧🇷 Brazil |
Possible
About 30% of wildlife watchers report a Southern Monarch sighting in Iberá National Park on a given day, based on 22 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 7th most-seen of the 35 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.
April and June–July
In those months about 40% of wildlife watchers report a Southern Monarch in Iberá National Park on a given day, against under 5% in March and December, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Southern Monarch sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Southern Monarch sightings, Iberá National Park ranks 2nd at about 30%, level with the leaders once rounded. The best odds are in El Palmar National Park (Argentina, about 30%).
Same genus: Danaus
The closest relatives of the Southern Monarch that you can see in Iberá National Park (genus Danaus, Tiger Milkweed Butterflies) are Queen (about 30%) and Soldier (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Southern Monarch is recorded against all the insects logged in Iberá National Park (22 verified sightings from 2019 to 2026), 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.
