Spinus crassirostris
Silhouette: Andy Wilson · PhyloPic
In 3 days ~20% in a week ~40%
The thick-billed siskin (Spinus crassirostris) is a species of bird in the family Fringillidae, the finches and euphonias. It is found in Argentina, Bolivia, Chile, and Peru. The thick-billed siskin was originally described in 1877 with the binomial Chrysomitris crassirostris. 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.
Some birds with colors intermediate between those of the two subspecies are postulated to be a third subspecies. The thick-billed siskin is one of the larger members of genus Spinus and has the eponymous thick bill. It is 12.5 to 14 cm (4.9 to 5.5 in) long and weighs about 19 g (0.67 oz). The species is sexually dimorphic. Adult males of the nominate subspecies have a black head, neck, and throat with a thin... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lauca National Park | 🇨🇱 Chile |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Thick-billed Siskin sighting in Lauca National Park on a given day, based on 70 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 84th 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 40%, if each day is a fresh chance.
January, March, May and September–November
In those months about 10% of wildlife watchers report a Thick-billed Siskin in Lauca National Park on a given day, against under 5% in February, April, June–August and December, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Thick-billed Siskin 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 Lauca National Park, in our data
Lauca National Park is the only park on Wallace's Line with enough records to rate Thick-billed Siskin sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Spinus
The closest relatives of the Thick-billed 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 Yellow-rumped Siskin (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Thick-billed Siskin is recorded against all the birds logged in Lauca National Park (70 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.
