Chionis albus
Silhouette: Photo by Peter W. Hills (2014) · PhyloPic
In 3 days <5%
The snowy sheathbill (Chionis albus), also known as the greater sheathbill, pale-faced sheathbill, and paddy, is one of two species of sheathbill. It is usually found on the ground. It is the only land bird native to the Antarctic continent.
The snowy sheathbill was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it in a new genus Vaginalis and coined the binomial name Vaginalis alba. Gmelin based his description on the "white sheath-bill" that had been described and illustrated in 1785 by the English ornithologist John Latham
in his A General Synopsis of Birds. Latham erroneously believed that the bird was found in New Zealand. The type locality was designated as the Falkland Islands by Baron Bradford and Charles Chubb in 1912. The snowy sheathbill is now placed in the genus Chionis that was introduced in 1788 by the German naturalist Johann Reinhold Forster. The genus name is from the Ancient Greek khiōn meaning snow. The specific epithet albus is Latin meaning "white". The species is monotypic: no subspecies are recognised.
A snowy sheathbill... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Península Valdés | 🇦🇷 Argentina | |
| 2 | Table Mountain National Park | 🇿🇦 South Africa | |
| 3 | Tierra del Fuego National Park | 🇦🇷 Argentina |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montevideo | 🇺🇾 Uruguay |
Rare
Under 5% of wildlife watchers report a Snowy Sheathbill sighting in Montevideo on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 172nd most-seen of the 178 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 Snowy Sheathbill in Montevideo on a given day, so our monthly data shows no clear season.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Snowy Sheathbill sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Montevideo, in our data
Montevideo is the only city on Wallace's Line with enough records to rate Snowy Sheathbill sightings: under 5% of wildlife watchers there report one on a given day.
Same order: Charadriiformes
The closest relatives of the Snowy Sheathbill that you can see in Montevideo (order Charadriiformes, Shorebirds and Allies) are Southern Lapwing (about 60%), Dominican Gull (about 40%) and Brown-hooded Gull (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Snowy Sheathbill is recorded against all the birds logged in Montevideo (5 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.
