Coccyzus euleri
Silhouette: Andy Wilson · PhyloPic
In 3 days <5%
The pearly-breasted cuckoo (Coccyzus euleri) is a species of bird in the tribe Phaenicophaeini, subfamily Cuculinae of the cuckoo family Cuculidae. It is found in Argentina, Bolivia, Brazil, Ecuador, French Guiana, Guyana, Paraguay, Suriname, Venezuela, and possibly Colombia and Panama.
The taxonomic history of the pearly-breasted cuckoo is complicated. For many years it was considered a subspecies of the yellow-billed cuckoo (Coccyzus americanus) due to confusion about the identity of a specimen collected on Sombrero Island in the Lesser Antilles. The specimen was originally described as a species with the binomial C. julieni. The identity of the South American birds bounced between that treatment and treatment as the yellow-billed subspecies before its current designation as C. euleri was settled in 1992.
The pearly-breasted cuckoo is monotypic. The pearly-breasted cuckoo is 25 to 28 cm (9.8 to 11 in) long, about half of which is the tail. Males weigh about 45 to 53 g (1.6 to 1.9 oz) and females about 54 to 61 g (1.9 to 2.2 oz). Their bill is stout and somewhat decurved. Its maxilla is brown to black with a yellow base and its mandible... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Iguaçu National Park | 🇧🇷 Brazil | |
| 2 | Iguazú National Park | 🇦🇷 Argentina |
Rare
Under 5% of wildlife watchers report a Pearly-breasted Cuckoo sighting in Iguazú National Park on a given day, based on 17 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 301st most-seen of the 343 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Pearly-breasted Cuckoo in Iguazú National Park on a given day, so our monthly data shows no clear season.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Pearly-breasted Cuckoo sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Pearly-breasted Cuckoo sightings, Iguazú National Park ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Iguaçu National Park (Brazil, under 5%).
GBIF citizen-science records
It is estimated from how often the Pearly-breasted Cuckoo is recorded against all the birds logged in Iguazú National Park (17 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.
