Acanthidops bairdi
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~30%
The peg-billed finch (Acanthidops bairdi) is a passerine bird endemic to the highlands of Costa Rica and western Panama. Despite its name, it is not a true finch, but now recognized as a member of the tanager family (Thraupidae), after being long placed in the Emberizidae. It is the only member of the genus Acanthidops. The scientific name commemorates the American ornithologist Spencer Fullerton Baird.
The peg-billed finch was formally described in 1882 by the American ornithologist Robert Ridgway from a specimen collected near the Irazú Volcano in Costa Rica. To accommodate the new species Ridgway introduced the genus Acanthidops and coined the binomial name Acanthidops bairdi. The genus name combines the Ancient Greek akanthis meaning "spiky" with ōps meaning "face". The specific epithet honours the American naturalist Spencer Fullerton Baird. No subspecies are recognised.
The peg-billed finch is a long-tailed species, 13.5 cm long and weighing 16 g. It has a distinctive long upturned bill with a black upper mandible and yellow lower mandible. The adult male is slate grey, becoming paler on the belly. The female is olive-brown above, becoming paler... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 2 | Irazú Volcano National Park | 🇨🇷 Costa Rica | |
| 3 | Los Quetzales National Park | 🇨🇷 Costa Rica | |
| 4 | Poás Volcano National Park | 🇨🇷 Costa Rica | |
| 5 | Volcán Barú National Park | 🇵🇦 Panama | |
| 6 | Chirripó National Park | 🇨🇷 Costa Rica | |
| 7 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 8 | La Amistad International Park (Panama) | 🇵🇦 Panama |
With luck
About 10% of wildlife watchers report a Peg-billed Finch sighting in Irazú Volcano National Park on a given day, based on 45 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 64th most-seen of the 121 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
December
In that month about 20% of wildlife watchers report a Peg-billed Finch in Irazú Volcano National Park on a given day, against under 5% in March–May, July–August and October–November, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Peg-billed Finch sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 8 parks where we can rate Peg-billed Finch sightings, Irazú Volcano National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Tapantí-Macizo de la Muerte National Park (Costa Rica, about 10%).
GBIF citizen-science records
It is estimated from how often the Peg-billed Finch is recorded against all the birds logged in Irazú Volcano National Park (45 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.
