Rynchops niger
Silhouette: Daniel Nuñez-Leon · PhyloPic
In 3 days ~20% in a week ~40%
The black skimmer (Rynchops niger) is a tern-like seabird, one of three similar bird species in the skimmer genus Rynchops in the gull family Laridae. It breeds in North and South America. Northern populations winter in the warmer waters of the Caribbean and the tropical and subtropical Pacific and Atlantic coasts, but South American populations make only shorter movements in response to annual floods which extend their feeding areas in the river shallows.
The black skimmer was described by the Swedish naturalist Carl Linnaeus in 1755 in the tenth edition of his Systema Naturae and given the binomial name Rynchops niger. The genus name Rynchops is from the Ancient Greek ῥυvχος/rhunkhos meaning "bill" and κοπτω/koptō meaning "to cut off". The specific niger is the Latin word for "black". The black skimmer is one of three species in the genus Rynchops.
There are three subspecies: The black skimmer is the largest of the three skimmer species. It measures 40–50 cm (16–20 in) long with a 107–127 cm (42–50 in) wingspan. This species ranges from 212 to 447 g (7.5 to 15.8 oz), with males averaging about 349 g (12.3 oz), as compared to the smaller females 254... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lima | 🇵🇪 Peru | |
| 2 | São Luís | 🇧🇷 Brazil | |
| 3 | Havana | 🇨🇺 Cuba | |
| 4 | San Diego | 🇺🇸 United States | |
| 5 | Panama City | 🇵🇦 Panama | |
| 6 | Los Angeles | 🇺🇸 United States | |
| 7 | Barranquilla | 🇨🇴 Colombia | |
| 8 | Rio de Janeiro | 🇧🇷 Brazil | |
| 9 | Montevideo | 🇺🇾 Uruguay | |
| 10 | San Francisco | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Black Skimmer sighting in Caroni Swamp on a given day, based on 33 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 103rd most-seen of the 169 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.
July
In that month about 20% of wildlife watchers report a Black Skimmer in Caroni Swamp on a given day, against under 5% in March–June and November–December, the lowest months. That is one of Caroni Swamp's wettest months, with about 120 mm of rain against 25 mm in February.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Black Skimmer sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
11th of 28
Of the 28 parks where we can rate Black Skimmer sightings, Caroni Swamp ranks 11th at about 10%. The best odds are in Parque Estadual Encontro das Águas (Brazil, about 60%), Ría Lagartos Biosphere Reserve (Mexico, about 50%) and Merritt Island National Wildlife Refuge (United States, about 30%). All parks ranked.
GBIF citizen-science records
It is estimated from how often the Black Skimmer is recorded against all the birds logged in Caroni Swamp (33 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.
