Asthenes pyrrholeuca
Silhouette: Sheatherius · PhyloPic
In 3 days ~50% in a week ~80%
The sharp-billed canastero or lesser canastero (Asthenes pyrrholeuca) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina, Bolivia, Chile, Paraguay, and Uruguay, and has also occurred as a vagrant in Brazil.
The sharp-billed canastero's taxonomy is unsettled. The IOC and HBW consider affinis to be a seasonal morph of sordida and flavogularis to be a seasonal morph of the nominate pyrrholeuca. This article follows the two-subspecies model.
The sharp-billed canastero is 14 to 15 cm (5.5 to 5.9 in) long and weighs 12 to 14 g (0.42 to 0.49 oz). It is one of the smaller canasteros, with a pointed bill that is thinner than those of most others. The sexes have the same plumage. Adults of the nominate subspecies have a gray-brown face with a paler supercilium... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Península Valdés | 🇦🇷 Argentina | |
| 2 | Nahuel Huapi National Park | 🇦🇷 Argentina | |
| 3 | Torres del Paine National Park | 🇨🇱 Chile |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rosario | 🇦🇷 Argentina | |
| 2 | Cordoba | 🇦🇷 Argentina | |
| 3 | Buenos Aires | 🇦🇷 Argentina | |
| 4 | Asuncion | 🇵🇾 Paraguay |
Possible
About 20% of wildlife watchers report a Sharp-billed Canastero sighting in Nahuel Huapi National Park on a given day, based on 197 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 34th most-seen of the 111 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
February and October–December
In those months about 30% of wildlife watchers report a Sharp-billed Canastero in Nahuel Huapi National Park on a given day, against under 5% in May and July, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Sharp-billed Canastero sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 3
Of the 3 parks where we can rate Sharp-billed Canastero sightings, Nahuel Huapi National Park ranks 2nd at about 20%. The best odds are in Península Valdés (Argentina, about 30%).
GBIF citizen-science records
It is estimated from how often the Sharp-billed Canastero is recorded against all the birds logged in Nahuel Huapi National Park (197 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.
