Zimmerius gracilipes
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~10% in a week ~20%
The slender-footed tyrannulet (Zimmerius gracilipes) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela. The slender-footed tyrannulet was originally described as Tyranniscus gracilipes. Through much of the twentieth century it and several other tyrannulets were kept in genus Tyranniscus but a study published in 1977 erected the present genus Zimmerius for them.
What are now the red-billed tyrannulet (Z. cinereicapilla) and the Guianan tyrannulet (Z. acer) were previously treated as additional subspecies. The slender-footed tyrannulet is 9 to 12 cm (3.5 to 4.7 in) long and weighs 6.6 to 9.5 g (0.23 to 0.34 oz). The sexes have the same plumage. Adults of the nominate subspecies have a gray forehead and crown. They have a thin whitish supercilium that starts at their lores and a dark stripe through the eye on an otherwise yellowish white face. Their back and rump are dull olive. Their wings are dusky with... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Brownsberg Nature Park | 🇸🇷 Suriname | |
| 2 | Amacayacu National Natural Park | 🇨🇴 Colombia | |
| 3 | Anavilhanas National Park | 🇧🇷 Brazil | |
| 4 | Sierra de la Macarena National Park | 🇨🇴 Colombia | |
| 5 | Yasuní National Park | 🇪🇨 Ecuador | |
| 6 | Cuyabeno Wildlife Reserve | 🇪🇨 Ecuador | |
| 7 | Manu National Park | 🇵🇪 Peru | |
| 8 | Tambopata National Reserve | 🇵🇪 Peru |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Recife | 🇧🇷 Brazil |
Rare
Under 5% of wildlife watchers report a Slender-footed Tyrannulet sighting in Yasuní National Park on a given day, based on 115 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 288th most-seen of the 533 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.
January, April and July–August
In those months about 10% of wildlife watchers report a Slender-footed Tyrannulet in Yasuní National Park on a given day, against under 5% in February–March, May–June and September–December, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Slender-footed Tyrannulet sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
5th of 8
Of the 8 parks where we can rate Slender-footed Tyrannulet sightings, Yasuní National Park ranks 5th at under 5%. The best odds are in Brownsberg Nature Park (Suriname, about 40%), Amacayacu National Natural Park (Colombia, about 20%) and Anavilhanas National Park (Brazil, about 10%).
GBIF citizen-science records
It is estimated from how often the Slender-footed Tyrannulet is recorded against all the birds logged in Yasuní National Park (115 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.
