Phaeomyias murina
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~30% in a week ~60%
The mouse-colored tyrannulet (Nesotriccus murinus) is a species of bird in subfamily Elaeniinae of the tyrant flycatchers family Tyrannidae. It is found from Costa Rica and Panama south to Brazil and northern Argentina. The mouse-colored tyrannulet has sometimes been split into two species, the northern mouse-colored tyrannulet and the southern mouse-colored tyrannulet.
The mouse-colored tyrannulet was formally described in 1825 by the German naturalist Johann Baptist von Spix under the binomial name Platyrhynchus murinus based on a specimen from Brazil. The specific epithet is Modern Latin meaning "mouse-grey" from Latin murinus meaning "of mice". The type locality has been restricted to Juazeiro in the state of Bahia in eastern Brazil. The mouse-colored tyrannulet is now one of four species placed in the genus Nesotriccus that was introduced by Charles Haskins Townsend in 1895.
Four subspecies are recognised: Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Anavilhanas National Park | 🇧🇷 Brazil | |
| 2 | Chapada dos Guimarães National Park | 🇧🇷 Brazil | |
| 3 | Henri Pittier National Park | 🇻🇪 Venezuela | |
| 4 | Machalilla National Park | 🇪🇨 Ecuador | |
| 5 | Chapada Diamantina National Park | 🇧🇷 Brazil | |
| 6 | Amacayacu National Natural Park | 🇨🇴 Colombia | |
| 7 | Farallones de Cali National Natural Park | 🇨🇴 Colombia | |
| 8 | Amboró National Park | 🇧🇴 Bolivia | |
| 9 | Tayrona National Natural Park | 🇨🇴 Colombia | |
| 10 | Manu National Park | 🇵🇪 Peru | |
| 11 | La Amistad International Park (Panama) | 🇵🇦 Panama | |
| 12 | Tambopata National Reserve | 🇵🇪 Peru |
With luck
About 10% of wildlife watchers report a Mouse-Coloured Tyrannulet sighting in Anavilhanas National Park on a given day, based on 51 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 103rd most-seen of the 291 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
July and August
In those months about 30% of wildlife watchers report a Mouse-Coloured Tyrannulet in Anavilhanas National Park on a given day, against under 5% in May, September and November, the lowest months. Those are among Anavilhanas National Park's driest months, with about 90 mm of rain a month against 340 mm in March.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Mouse-Coloured Tyrannulet 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 12 parks where we can rate Mouse-Coloured Tyrannulet sightings, Anavilhanas National Park has the highest daily chance: about 10%. Next come Chapada dos Guimarães National Park (Brazil, about 10%) and Henri Pittier National Park (Venezuela, under 5%).
Same family: Tyrannidae
The closest relatives of the Mouse-Coloured Tyrannulet that you can see in Anavilhanas National Park (family Tyrannidae, Tyrant Flycatchers) are Tropical Kingbird (about 50%), Snethlage's Tody-Tyrant (about 40%) and Great Kiskadee (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Mouse-Coloured Tyrannulet is recorded against all the birds logged in Anavilhanas National Park (51 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.
