Spinus uropygialis
Silhouette: Andy Wilson · PhyloPic
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Yellow-rumped Siskin sighting in La Paz on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 77th most-seen of the 88 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
March, May and August
In those months about 10% of wildlife watchers report a Yellow-rumped Siskin in La Paz on a given day, against under 5% in April, June–July and September–February, the lowest months.
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 La Paz, in our data
La Paz is the only city on Wallace's Line with enough records to rate Yellow-rumped Siskin sightings: under 5% 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 La Paz (genus Spinus, Siskins and New World Goldfinches) are Black Siskin (about 50%), Yellow-bellied Siskin (about 40%) and Hooded 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 La Paz (8 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.
