Mackenziaena leachii
Silhouette: Sheatherius · PhyloPic
In 3 days ~30% in a week ~50%
The large-tailed antshrike (Mackenziaena leachii) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Argentina, Brazil, Paraguay, and Uruguay. The large-tailed antshrike shares genus Mackenziaena with the tufted antshrike (M. severa) though there is some doubt about how closely they are related. Both species are monotypic.
The large-tailed antshrike is a large dark antbird with a long full tail. It is 25 to 26 cm (9.8 to 10 in) long and weighs 58 to 62 g (2.0 to 2.2 oz). The species exhibits significant sexual dimorphism, though both sexes have a moderately long black bill with a hook at the end like true shrikes. Adult males are mostly black with small white spots on their crown, nape, upperparts, and sides. Adult females are mostly brownish black. Their forehead is rufous, their crown is rufous with black edges on its feathers, their upperparts have pale buff spots, and their wings have pale buff bars. Their underparts are thickly spotted with buffy white and their crissum is barred with buffy white. Subadults resemble adult females but their spots are larger and their belly... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Itatiaia National Park | 🇧🇷 Brazil | |
| 2 | Iguazú National Park | 🇦🇷 Argentina | |
| 3 | Iguaçu National Park | 🇧🇷 Brazil | |
| 4 | Serra dos Órgãos National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | São Paulo | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Large-tailed Antshrike sighting in Itatiaia National Park on a given day, based on 168 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 160th most-seen of the 352 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
March
In that month about 20% of wildlife watchers report a Large-tailed Antshrike in Itatiaia National Park on a given day, against under 5% in May, the lowest month.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Large-tailed Antshrike sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 4 parks where we can rate Large-tailed Antshrike sightings, Itatiaia National Park has the highest daily chance: about 10%. Next come Iguazú National Park (Argentina, under 5%) and Iguaçu National Park (Brazil, under 5%).
GBIF citizen-science records
It is estimated from how often the Large-tailed Antshrike is recorded against all the birds logged in Itatiaia National Park (168 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.
