Phaeomyias murina
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Mouse-Coloured Tyrannulet sighting in Machalilla National Park on a given day, based on 27 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 147th most-seen of the 248 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.
February–March, August–September and December
In those months about 10% of wildlife watchers report a Mouse-Coloured Tyrannulet in Machalilla National Park on a given day, against under 5% in January, April–July and October–November, the lowest months.
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.
4th of 12
Of the 12 parks where we can rate Mouse-Coloured Tyrannulet sightings, Machalilla National Park ranks 4th at under 5%. The best odds are in Anavilhanas National Park (Brazil, about 10%), 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 Machalilla National Park (family Tyrannidae, Tyrant Flycatchers) are Tropical Kingbird (about 40%), Fulvous-headed Pygmy-Tyrant (about 40%) and Southern Beardless-Tyrannulet (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 Machalilla National Park (27 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.
