Melanopareia maximiliani
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~40%
The olive-crowned crescentchest (Melanopareia maximiliani) is a species of bird in the family Melanopareiidae. It is found in Argentina, Bolivia, and Paraguay. The crescentchests (genus Melanopareia) were previously included in family Rhinocryptidae, the tapaculos. A 2010 publication confirmed earlier work and created their present genus. The last has been suggested as a separate species due to vocal differences. In addition, a subpopulation of M. m. pallida might be an undescribed taxon.
The olive-crowned crescentchest is 15 cm (5.9 in) long. Males weigh 17.1 to 18.0 g (0.60 to 0.63 oz), one female weighed 16.7 g (0.59 oz), and unsexed specimens weighed 16.9 to 18.2 g (0.60 to 0.64 oz). The nominate subspecies' crown and upperparts are olive-brown, the throat deep buff, and the chest and belly ochraceous. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | El Impenetrable National Park | 🇦🇷 Argentina |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cordoba | 🇦🇷 Argentina |
With luck
About 10% of wildlife watchers report an Olive-crowned Crescentchest sighting in El Impenetrable National Park on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 160th most-seen of the 219 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
October
In that month about 20% of wildlife watchers report an Olive-crowned Crescentchest in El Impenetrable National Park on a given day, against under 5% in January to September, the lowest months. December has too few records to rate.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Olive-crowned Crescentchest sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only El Impenetrable National Park, in our data
El Impenetrable National Park is the only park on Wallace's Line with enough records to rate Olive-crowned Crescentchest sightings: about 10% of wildlife watchers there report one on a given day.
Same order: Passeriformes
The closest relatives of the Olive-crowned Crescentchest that you can see in El Impenetrable National Park (order Passeriformes, Perching Birds) are Brazilian Cardinal (about 80%), Blue-gray Saltator (about 80%) and Pearly-vented Tody-Tyrant (about 70%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Olive-crowned Crescentchest is recorded against all the birds logged in El Impenetrable National Park (16 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.
