Camptostoma obsoletum
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~10% in a week ~30%
The southern beardless tyrannulet (Camptostoma obsoletum) is a small passerine bird in subfamily Elaeniinae of family Tyrannidae, the tyrant flycatchers. It is found in Costa Rica, Panama, in every mainland South American country except Chile, and on Trinidad.
The southern beardless tyrannulet has these 13 subspecies: Several authors have suggested that the southern beardless tyrannulet may be composed of more than one species. Genetic evidence suggests that as many as three may be present. The Clements taxonomy divides the subspecies into two groups within the species.
The southern beardless tyrannulet shares genus Camptostoma with the northern beardless tyrannulet (C. imberbe); they have at times been considered conspecific and together they form a superspecies. The southern beardless tyrannulet is 9.5 to 10.5 cm (3.7 to 4.1 in) long and weighs 7 to 9 g (0.25 to 0.32 oz). It is a small flycatcher with a long pointed warbler-like bill. The sexes have the same... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lima | 🇵🇪 Peru | |
| 2 | Quito | 🇪🇨 Ecuador | |
| 3 | Guayaquil | 🇪🇨 Ecuador | |
| 4 | Porto Alegre | 🇧🇷 Brazil | |
| 5 | Belém | 🇧🇷 Brazil | |
| 6 | Cali | 🇨🇴 Colombia | |
| 7 | Rosario | 🇦🇷 Argentina | |
| 8 | Curitiba | 🇧🇷 Brazil | |
| 9 | Rio de Janeiro | 🇧🇷 Brazil | |
| 10 | Belo Horizonte | 🇧🇷 Brazil |
Rare
Under 5% of wildlife watchers report a Southern Beardless-Tyrannulet sighting in Piedras Blancas National Park on a given day, based on 103 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 186th most-seen of the 344 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
October
In that month about 20% of wildlife watchers report a Southern Beardless-Tyrannulet in Piedras Blancas National Park on a given day, against under 5% in January, March–May, July–September and November, the lowest months. That is one of Piedras Blancas National Park's wettest months, with about 650 mm of rain against 55 mm in February.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Southern Beardless-Tyrannulet sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
29th of 40
Of the 40 parks where we can rate Southern Beardless-Tyrannulet sightings, Piedras Blancas National Park ranks 29th at under 5%. The best odds are in Machalilla National Park (Ecuador, about 30%), Serra da Canastra National Park (Brazil, about 30%) and Chapada Diamantina National Park (Brazil, about 30%).
Same family: Tyrannidae
The closest relatives of the Southern Beardless-Tyrannulet that you can see in Piedras Blancas National Park (family Tyrannidae, Tyrant Flycatchers) are Tropical Kingbird (about 60%), Great Kiskadee (about 60%) and Social Flycatcher (about 50%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Southern Beardless-Tyrannulet is recorded against all the birds logged in Piedras Blancas National Park (103 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.
