Cantorchilus guarayanus
Silhouette: Matt Wilkins · PhyloPic
In 3 days ~10% in a week ~30%
The fawn-breasted wren (Cantorchilus guarayanus) is a species of bird in the family Troglodytidae. It is found in Bolivia, Brazil, and Paraguay. The fawn-breasted wren has sometimes been treated as conspecific with the buff-breasted wren (Cantorchilus leucotis), though they have very different vocalizations. The species is monotypic.
The fawn-breasted wren is 13.5 cm (5.3 in) long and weighs 13 to 14 g (0.46 to 0.49 oz). Adults have a plain medium brown crown and upperparts that becomes rufescent on the lower back and rump. Their tail is reddish brown with crisp black bars. They have a narrow white supercilium mostly behind the eye, cheeks mottled gray-white and blackish, and black malar and moustachial stripes. Their chin is whitish, the chest a warm orange-buff, and the belly and vent area a deeper orange-buff. Juveniles are similar but their facial markings are less distinct.
The fawn-breasted wren is found across much of northeastern Bolivia, a fairly thin slice of adjacent western Brazil, and a small part of northeastern Paraguay. It inhabits várzea scrubland and secondary forest, mostly near water... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Parque Estadual Encontro das Águas | 🇧🇷 Brazil | |
| 2 | Amboró National Park | 🇧🇴 Bolivia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Santa Cruz de la Sierra | 🇧🇴 Bolivia |
Rare
Under 5% of wildlife watchers report a Fawn-breasted Wren sighting in Santa Cruz de la Sierra on a given day, based on 17 verified sightings from GBIF citizen-science data. It is the 125th most-seen of the 208 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.
March, May and September–October
In those months about 10% of wildlife watchers report a Fawn-breasted Wren in Santa Cruz de la Sierra on a given day, against under 5% in April, June–August and November–February, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Fawn-breasted Wren 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 Santa Cruz de la Sierra, in our data
Santa Cruz de la Sierra is the only city on Wallace's Line with enough records to rate Fawn-breasted Wren sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Troglodytidae
The closest relatives of the Fawn-breasted Wren that you can see in Santa Cruz de la Sierra (family Troglodytidae, Wrens) are Thrush-like Wren (about 50%) and Southern House Wren (about 50%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Fawn-breasted Wren is recorded against all the birds logged in Santa Cruz de la Sierra (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.
