Myiothlypis rivularis
Silhouette: Andy Wilson · PhyloPic
In 3 days ~40% in a week ~70%
The riverbank warbler (Myiothlypis rivularis) is a species of bird in the family Parulidae, the New World warblers. It is found in Argentina, Bolivia, Brazil, French Guiana, Guyana, Paraguay, and Uruguay. The riverbank warbler was formally described in 1821 with the binomial Muscicapa rivularis.
The riverbank warbler has a complicated taxonomic history since its original description. At some time in the nineteenth century it was reassigned to genus Basileuterus that had been erected in 1848. In 1929 W. E. Clyde Todd erected a new genus, Phaeothlypis, and in 1968 other authors assigned rivularis to it. In the early twenty-first century several studies confirmed that many species in Phaeothlypis were nested within Basileuterus but that the latter was polyphyletic. By 2007 taxonomic systems had begun to resurrect genus Myiothlypis, which had been erected in 1850, for the riverbank warbler and many other species. Some late twentieth century authors treated the riverbank warbler and the buff-rumped warbler (M. fulvicauda) as conspecific, and there is some evidence that they form a superspecies.
The riverbank warbler has also borne the English names "Neotropical... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Amboró National Park | 🇧🇴 Bolivia | |
| 2 | Iguaçu National Park | 🇧🇷 Brazil | |
| 3 | Iguazú National Park | 🇦🇷 Argentina | |
| 4 | Itatiaia National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Santos | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Riverbank Warbler sighting in Iguazú National Park on a given day, based on 672 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 90th most-seen of the 343 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
April–May, August and October
In those months about 20% of wildlife watchers report a Riverbank Warbler in Iguazú National Park on a given day, against about 10% in June–July, September and November–March, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Riverbank Warbler sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 4
Of the 4 parks where we can rate Riverbank Warbler sightings, Iguazú National Park ranks 3rd at about 10%. The best odds are in Amboró National Park (Bolivia, about 30%) and Iguaçu National Park (Brazil, about 20%).
GBIF citizen-science records
It is estimated from how often the Riverbank Warbler is recorded against all the birds logged in Iguazú National Park (672 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.
