Asthenes pyrrholeuca
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~40%
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 |
With luck
About 10% of wildlife watchers report a Sharp-billed Canastero sighting in Rosario on a given day, based on 17 verified sightings from GBIF citizen-science data. It is the 96th 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 40%, if each day is a fresh chance.
May
In that month about 30% of wildlife watchers report a Sharp-billed Canastero in Rosario on a given day, against under 5% in August to April, the lowest months. That is one of Rosario's driest months, with about 50 mm of rain against 150 mm in March.
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.
Yes
Of the 4 cities where we can rate Sharp-billed Canastero sightings, Rosario has the highest daily chance: about 10%. Next come Cordoba (Argentina, under 5%) and Buenos Aires (Argentina, under 5%).
Same family: Furnariidae
The closest relatives of the Sharp-billed Canastero that you can see in Rosario (family Furnariidae, Ovenbirds and Woodcreepers) are Rufous Hornero (about 90%), Sooty-fronted Spinetail (about 40%) and Narrow-billed Woodcreeper (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sharp-billed Canastero is recorded against all the birds logged in Rosario (17 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.
