Myrmotherula schisticolor
Silhouette: Sheatherius · PhyloPic
In 3 days ~10% in a week ~30%
The slaty antwren (Myrmotherula schisticolor) is a small passerine bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found from Mexico south through Central America, Colombia, Ecuador, Peru, and Venezuela.
The slaty antwren, Rio Suno antwren (M. sunensis), and Salvadori's antwren (M. minor) have similar morphology, behavior, and voices and may form a monophyletic group. The slaty antwren is 9 to 12 cm (3.5 to 4.7 in) long and weighs 8.5 to 10 g (0.30 to 0.35 oz). It is a smallish bird with a short tail. Adult males of the nominate subspecies are mostly dark gray with a hidden white patch between the shoulders. Their tail is dark gray with thin white edges to the feathers. Their wings are dark gray with white tips on the coverts. Their throat and upper breast are black; their crissum is dark gray with whitish tips on the feathers. Adult females have grayish olive upperparts with a browner tail. Their wings are browner than the back with... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Henri Pittier National Park | 🇻🇪 Venezuela | |
| 2 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 3 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 4 | Carara National Park | 🇨🇷 Costa Rica | |
| 5 | Machalilla National Park | 🇪🇨 Ecuador | |
| 6 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 7 | Corcovado National Park | 🇨🇷 Costa Rica | |
| 8 | La Amistad International Park (Panama) | 🇵🇦 Panama | |
| 9 | Chirripó National Park | 🇨🇷 Costa Rica | |
| 10 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 11 | Farallones de Cali National Natural Park | 🇨🇴 Colombia | |
| 12 | Volcán Barú National Park | 🇵🇦 Panama | |
| 13 | Sierra de la Macarena National Park | 🇨🇴 Colombia | |
| 14 | Darién National Park | 🇵🇦 Panama | |
| 15 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 16 | Piedras Blancas National Park | 🇨🇷 Costa Rica | |
| 17 | Los Nevados National Natural Park | 🇨🇴 Colombia | |
| 18 | Poás Volcano National Park | 🇨🇷 Costa Rica | |
| 19 | Los Quetzales National Park | 🇨🇷 Costa Rica |
Rare
Under 5% of wildlife watchers report a Slaty Antwren sighting in Machalilla National Park on a given day, based on 35 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 136th 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 30%, if each day is a fresh chance.
July and October–December
In those months about 10% of wildlife watchers report a Slaty Antwren in Machalilla National Park on a given day, against under 5% in January–June and August–September, the lowest months. Those are among Machalilla National Park's driest months, with about 15 mm of rain a month against 140 mm in February.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Slaty Antwren sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
5th of 19
Of the 19 parks where we can rate Slaty Antwren sightings, Machalilla National Park ranks 5th at under 5%. The best odds are in Henri Pittier National Park (Venezuela, about 10%), Monteverde Cloud Forest Reserve (Costa Rica, about 10%) and Arenal Volcano National Park (Costa Rica, about 10%).
Same family: Thamnophilidae
The closest relatives of the Slaty Antwren that you can see in Machalilla National Park (family Thamnophilidae, Typical Antbirds) are Collared Antshrike (about 30%), Plain Antvireo (about 10%) and Great Antshrike (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Slaty Antwren is recorded against all the birds logged in Machalilla National Park (35 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.
