Spinus uropygialis
Silhouette: Andy Wilson · PhyloPic
In 3 days ~20% in a week ~50%
The yellow-rumped siskin (Spinus uropygialis) is a species of bird in the family Fringillidae, the finches and euphonias. It is found in Argentina, Bolivia, Chile, and Peru. The yellow-rumped siskin was originally described in 1862 with the binomial Chrysomitris uropygialis. It was later moved to what was then the subgenus Spinus within genus Carduelis and also spent time in genus Sporagra. Beginning in about 2009 the subgenus was elevated to full genus level and the yellow-rumped siskin, the rest of the New World siskins, and the New World goldfinches were therefore elevated to now-genus Spinus.
The yellow-rumped siskin is monotypic. It is believed to hybridize with the hooded siskin (S. magellanicus) in Peru. The yellow-rumped siskin is 12 to 14 cm (4.7 to 5.5 in) long; one individual weighed 14 g (0.49 oz). The species is sexually dimorphic but not dramatically so. Adult males have a sooty black head, neck, throat, and upper breast. Their back is sooty black, their rump bright yellow, and their uppertail coverts blackish with wide yellowish edges. Their tail is mostly black with wide yellow edges at the bases of the outer feathers... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lauca National Park | 🇨🇱 Chile |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | La Paz | 🇧🇴 Bolivia |
With luck
About 10% of wildlife watchers report a Yellow-rumped Siskin sighting in Lauca National Park on a given day, based on 62 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 80th most-seen of the 112 birds 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.
October
In that month about 20% of wildlife watchers report a Yellow-rumped Siskin in Lauca National Park on a given day, against under 5% in March–April and June, the lowest months. That is one of Lauca National Park's driest months, with about 20 mm of rain against 150 mm in January.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Yellow-rumped Siskin sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Lauca National Park, in our data
Lauca National Park is the only park on Wallace's Line with enough records to rate Yellow-rumped Siskin sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Spinus
The closest relatives of the Yellow-rumped Siskin that you can see in Lauca National Park (genus Spinus, Siskins and New World Goldfinches) are Hooded Siskin (about 40%), Black Siskin (about 40%) and Thick-billed Siskin (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-rumped Siskin is recorded against all the birds logged in Lauca National Park (62 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.
