Nyctanassa violacea
Silhouette: Sheatherius · PhyloPic
In 3 days <5%
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 |
Rare
Under 5% of wildlife watchers report a Yellow-crowned Night-Heron sighting in Chicago on a given day, based on 127 verified sightings from GBIF citizen-science data. It is the 250th most-seen of the 314 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 Yellow-crowned Night-Heron in Chicago on a given day, so our monthly data shows no clear season.
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.
36th of 36
Of the 36 cities where we can rate Yellow-crowned Night-Heron sightings, Chicago ranks 36th at under 5%. 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 Chicago (family Ardeidae, Herons, Egrets, and Bitterns) are Great Blue Heron (about 20%), Black-crowned Night Heron (about 10%) and Green Heron (about 10%), 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 Chicago (127 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.
