Rostrhamus sociabilis
Silhouette: Sharon Wegner-Larsen · PhyloPic
In 3 days ~40% in a week ~60%
The snail kite (Rostrhamus sociabilis) is a bird of prey within the family Accipitridae, which also includes the eagles, hawks, and Old World vultures. Its relative, the slender-billed kite, is now again placed in Helicolestes, making the genus Rostrhamus monotypic. Usually, it is placed in the Milvine kites, but the validity of that grouping is under investigation.
Lerner and Mindell (2005) found R. sociabilis sister to Geranospiza caerulescens, and that those two along with Ictinea plumbea were basal to both the Buteogallus and Buteo clades. They concluded that Rostrhamus belonged in Buteoninae (sensu stricto) and not in Milvinae, but noted that more investigation was needed.
The snail kite breeds in tropical South America, the Caribbean, and central and southern Florida in the United States. It is resident all-year round in most of its range, but the southernmost population migrates north in winter and the Caribbean birds disperse widely outside the breeding season.
Snail kites are 36 to 48 cm (14 to 19 in) long with a 99–120 cm (39–47 in) wingspan. They weigh from 300 to 570 g (11 to 20 oz). There is very limited sexual dimorphism... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Barranquilla | 🇨🇴 Colombia | |
| 2 | Santa Cruz de la Sierra | 🇧🇴 Bolivia | |
| 3 | Asuncion | 🇵🇾 Paraguay | |
| 4 | Maceió | 🇧🇷 Brazil | |
| 5 | Fortaleza | 🇧🇷 Brazil | |
| 6 | Belo Horizonte | 🇧🇷 Brazil | |
| 7 | Guayaquil | 🇪🇨 Ecuador | |
| 8 | Curitiba | 🇧🇷 Brazil | |
| 9 | Buenos Aires | 🇦🇷 Argentina | |
| 10 | Belém | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Snail Kite sighting in Asuncion on a given day, based on 254 verified sightings from GBIF citizen-science data. It is the 63rd most-seen of the 224 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
February–March and August–September
In those months about 20% of wildlife watchers report a Snail Kite in Asuncion on a given day, against about 10% in April–July and October–January, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Snail Kite sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 26
Of the 26 cities where we can rate Snail Kite sightings, Asuncion ranks 3rd at about 10%. The best odds are in Barranquilla (Colombia, about 60%) and Santa Cruz de la Sierra (Bolivia, about 30%).
Same family: Accipitridae
The closest relatives of the Snail Kite that you can see in Asuncion (family Accipitridae, Hawks, Eagles, and Kites) are Roadside Hawk (about 40%) and Great Black-Hawk (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Snail Kite is recorded against all the birds logged in Asuncion (254 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.
