Nyctanassa violacea
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~50%
The yellow-crowned night heron (Nyctanassa violacea) is one of two species of night heron in the genus Nyctanassa. Unlike the black-crowned night heron, which has a worldwide distribution, the yellow-crowned is restricted to the Americas. It is known as the bihoreau violacé in French and the pedrete corona clara or yaboa común in some Spanish-speaking countries.
The yellow-crowned night heron was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae. He placed it with herons, cranes and egrets in the genus Ardea and coined the binomial name Ardea violacea. Linnaeus based his account on the "crested bittern" that had been described in 1729–1732 by the English naturalist Mark Catesby in the first volume of his The Natural History of Carolina, Florida and the Bahama Islands. Linnaeus specified the type locality as North America, but this has been restricted to the Carolinas following Catesby. The yellow-crowned night heron is now placed together with the extinct Bermuda night heron in the genus Nyctanassa that was introduced in 1887 by the Norwegian born zoologist Leonhard Stejneger. Its congener, the Bermuda night... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Guayaquil | 🇪🇨 Ecuador | |
| 2 | São Luís | 🇧🇷 Brazil | |
| 3 | Panama City | 🇵🇦 Panama | |
| 4 | Miami | 🇺🇸 United States | |
| 5 | Monterrey | 🇲🇽 México | |
| 6 | Houston | 🇺🇸 United States | |
| 7 | Recife | 🇧🇷 Brazil | |
| 8 | Austin | 🇺🇸 United States | |
| 9 | San Antonio | 🇺🇸 United States | |
| 10 | Havana | 🇨🇺 Cuba |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Sedgwick County Zoo | 🇺🇸 United States | |
| 2 | Saint Louis Zoo | 🇺🇸 United States | |
| 3 | Virginia Zoological Park | 🇺🇸 United States | |
| 4 | Houston Zoo | 🇺🇸 United States | |
| 5 | San Antonio Zoo | 🇺🇸 United States | |
| 6 | Henry Vilas Zoo | 🇺🇸 United States | |
| 7 | Salisbury Zoo | 🇺🇸 United States | |
| 8 | Zoológico Tamatán | 🇲🇽 Mexico | |
| 9 | Aquarium of the Pacific | 🇺🇸 United States | |
| 10 | Florida Aquarium | 🇺🇸 United States | |
| 11 | South Carolina Aquarium | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Yellow-crowned Night-Heron sighting in João Pessoa on a given day, based on 26 verified sightings from GBIF citizen-science data. It is the 65th most-seen of the 99 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
March and May
In those months about 20% of wildlife watchers report a Yellow-crowned Night-Heron in João Pessoa on a given day, against under 5% in January and August–October, the lowest months. Those are among João Pessoa's wettest months, with about 150 mm of rain a month against 20 mm in November.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Yellow-crowned Night-Heron sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
13th of 36
Of the 36 cities where we can rate Yellow-crowned Night-Heron sightings, João Pessoa ranks 13th at about 10%. The best odds are in Guayaquil (Ecuador, about 30%), São Luís (Brazil, about 30%) and Panama City (Panama, about 30%).
Same family: Ardeidae
The closest relatives of the Yellow-crowned Night-Heron that you can see in João Pessoa (family Ardeidae, Herons, Egrets, and Bitterns) are Boat-billed Heron (about 30%), Striated Heron (about 20%) and Great Egret (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-crowned Night-Heron is recorded against all the birds logged in João Pessoa (26 verified sightings), 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.
