Cranioleuca sulphurifera
Silhouette: Abraão B. Leite · PhyloPic
In 3 days ~10% in a week ~20%
The sulphur-bearded reedhaunter or sulphur-throated spinetail (Limnoctites sulphuriferus) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina, Brazil, and Uruguay.
The sulphur-bearded reedhaunter was long placed in genus Cranioleuca, and for a time by itself in genus Limnornis, but a study published in 2011 placed it in genus Limnoctites. There it joined its sister species the straight-billed reedhaunter (L. rectirostris). The South American Classification Committee of the American Ornithological Society, the International Ornithological Committee, and the Clements taxonomy adopted the new genus starting in about 2019. However, as of November 2023 BirdLife International's Handbook of the Birds of the World retains it as Cranioleuca sulphurifera with the English name sulphur-throated spinetail.
The sulphur-bearded reedhaunter is monotypic. The sulphur-bearded reedhaunter is 15 to 16 cm (5.9 to 6.3 in) long and weighs 12 to 14 g (0.42 to 0.49 oz). The sexes have the same plumage. Adults have a buffish white supercilium on an otherwise grayish-streaked whitish face. Their crown,... Wikipedia →
Recording0:12
Argentina · 2014
© Nicolas Olejnik · iNaturalist · CC BY 4.0
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Argentina · 2026
© Juan M. Atencio · iNaturalist · CC BY-NC 4.0
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Argentina · 2023
© Gonzalo Diaz · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Iberá National Park | 🇦🇷 Argentina |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Buenos Aires | 🇦🇷 Argentina |
Rare
Under 5% of wildlife watchers report a Sulphur-bearded Spinetail sighting in Buenos Aires on a given day, based on 481 verified sightings from GBIF citizen-science data. It is the 141st most-seen of the 274 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.
October
In that month about 10% of wildlife watchers report a Sulphur-bearded Spinetail in Buenos Aires on a given day, against under 5% in November to September, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Sulphur-bearded Spinetail 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 Buenos Aires, in our data
Buenos Aires is the only city on Wallace's Line with enough records to rate Sulphur-bearded Spinetail sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Sulphur-bearded Spinetail is recorded against all the birds logged in Buenos Aires (481 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.
