Myiothlypis rivularis
Silhouette: Andy Wilson · PhyloPic
In 3 days <5% in a week ~10%
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 |
Rare
Under 5% of wildlife watchers report a Riverbank Warbler sighting in Santos on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 138th most-seen of the 203 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
October
In that month about 10% of wildlife watchers report a Riverbank Warbler in Santos on a given day, against under 5% in November to September, 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.
Only Santos, in our data
Santos is the only city on Wallace's Line with enough records to rate Riverbank Warbler sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Parulidae
The closest relatives of the Riverbank Warbler that you can see in Santos (family Parulidae, New World Warblers) are Tropical Parula (about 20%) and Golden-crowned Warbler (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Riverbank Warbler is recorded against all the birds logged in Santos (16 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.
