Progne chalybea
Silhouette: Andy Wilson · PhyloPic
In 3 days ~90% in a week >90%
The grey-breasted martin (Progne chalybea) is a large swallow from Central and South America. In 1760 the French zoologist Mathurin Jacques Brisson included a description of the grey-breasted martin in the second volume of his Ornithologie based on a specimen collected in Cayenne, French Guiana. He used the French name L'hirondelle de Cayenne and the Latin name Hirundo Cayanensis. Although Brisson coined Latin names, these do not conform to the binomial system and are not recognised by the International Commission on Zoological Nomenclature. The grey-breasted martin was subsequently described by the French polymath, the Comte de Buffon, in 1779 and by the English ornithologist John Latham in 1783. Latham used the English name "Chalybeate swallow" but neither Buffon nor Latham introduced a scientific name.
The German naturalist Johann Friedrich Gmelin included the grey-breasted martin when he revised and expanded Carl Linnaeus's Systema Naturae in 1789. He placed it with the swallows in the genus Hirundo and coined the binomial name Hirundo chalybea. The specific epithet chalybea is Latin meaning "steely". The grey-breasted martin is now one of nine species placed in the... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Belém | 🇧🇷 Brazil | |
| 2 | São Luís | 🇧🇷 Brazil | |
| 3 | Guayaquil | 🇪🇨 Ecuador | |
| 4 | Fortaleza | 🇧🇷 Brazil | |
| 5 | Panama City | 🇵🇦 Panama | |
| 6 | Buenos Aires | 🇦🇷 Argentina | |
| 7 | Natal | 🇧🇷 Brazil | |
| 8 | Asuncion | 🇵🇾 Paraguay | |
| 9 | Salvador | 🇧🇷 Brazil | |
| 10 | San Salvador | 🇸🇻 El Salvador |
Likely
About 50% of wildlife watchers report a Gray-breasted Martin sighting in São Luís on a given day, based on 31 verified sightings from GBIF citizen-science data. It is the 9th most-seen of the 74 birds we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
June
In that month about 70% of wildlife watchers report a Gray-breasted Martin in São Luís on a given day, against about 30% in February, August–October and December, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Gray-breasted Martin sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 43 cities where we can rate Gray-breasted Martin sightings, São Luís ranks 2nd at about 50%, level with the leaders once rounded. The best odds are in Belém (Brazil, about 50%).
GBIF citizen-science records
It is estimated from how often the Gray-breasted Martin is recorded against all the birds logged in São Luís (31 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.
