Arenaria interpres
Silhouette: Elaine R. Wilson (modified) · PhyloPic
In 3 days ~60% in a week ~90%
The ruddy turnstone (Arenaria interpres) is a small cosmopolitan wading bird, one of two species of turnstone in the genus Arenaria. It is now classified in the sandpiper family Scolopacidae but was formerly sometimes placed in the plover family Charadriidae. It is a highly migratory bird, breeding in northern parts of Eurasia and North America, and flying south to winter on coastlines almost worldwide. It is the only species of turnstone in much of its range and is often known simply as turnstone.
The ruddy turnstone was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Tringa interpres. The species is now placed together with the black turnstone in the genus Arenaria that was introduced by the French zoologist Mathurin Jacques Brisson in 1760 with the ruddy turnstone as the type species. The genus name arenaria is from Latin arenarius, "inhabiting sand", from arena, "sand". The specific interpres means "messenger"; when visiting Gotland in 1741, Linnaeus thought that the Swedish word Tolk, meaning "interpreter" applied to this species, but in the local dialect the word means "legs"... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Casablanca | 🇲🇦 Morocco | |
| 2 | São Luís | 🇧🇷 Brazil | |
| 3 | Maputo | 🇲🇿 Mozambique | |
| 4 | Liverpool | 🇬🇧 United Kingdom | |
| 5 | Havana | 🇨🇺 Cuba | |
| 6 | Dublin | 🇮🇪 Ireland | |
| 7 | Manama | 🇧🇭 Bahrain | |
| 8 | Rabat | 🇲🇦 Morocco | |
| 9 | Kuwait City | 🇰🇼 Kuwait | |
| 10 | Porto | 🇵🇹 Portugal |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | National Zoological Park | 🇺🇸 United States | |
| 2 | Cape May County Park & Zoo | 🇺🇸 United States | |
| 3 | Monterey Bay Aquarium | 🇺🇸 United States | |
| 4 | Montreal Biodome | 🇨🇦 Canada |
Possible
About 20% of wildlife watchers report a Ruddy Turnstone sighting in São Luís on a given day, based on 38 verified sightings from GBIF citizen-science data. It is the 38th most-seen of the 74 birds we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
October
In that month about 50% of wildlife watchers report a Ruddy Turnstone in São Luís on a given day, against about 10% in June and August, the lowest months. That is one of São Luís's driest months, with about 15 mm of rain against 360 mm in April.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Ruddy Turnstone sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 68
Of the 68 cities where we can rate Ruddy Turnstone sightings, São Luís ranks 2nd at about 20%. The best odds are in Casablanca (Morocco, about 40%).
Same family: Scolopacidae
The closest relatives of the Ruddy Turnstone that you can see in São Luís (family Scolopacidae, Sandpipers and Allies) are Hudsonian Whimbrel (about 30%), Spotted Sandpiper (about 30%) and Semipalmated Sandpiper (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Ruddy Turnstone is recorded against all the birds logged in São Luís (38 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.
