Streptoprocne rutila
Silhouette: Aviceda (vectorized by T. Michael Keesey) · PhyloPic
In 3 days <5% in a week ~10%
The chestnut-collared swift (Streptoprocne rutila) is a species of bird in subfamily Cypseloidinae of the swift family Apodidae. It is found from Mexico and Trinidad south to Peru and Bolivia. The chestnut-collared swift has at various times been placed in genera Cypseloides and Chaetura.
The chesnut-collared swift is one of the smaller members of genus Streptoprocne. It is 12 to 14 cm (4.7 to 5.5 in) long and weighs about 21 g (0.74 oz). It has a wide slightly notched tail and broad wings. Adult males of the nominate subspecies S. r. rutila have a sooty blackish brown crown, a blackish brown back, slightly paler rump and uppertail coverts, and a sooty blackish brown tail. They have a narrow black patch around the eye and grayish brown cheeks, chin, and throat with... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San José | 🇨🇷 Costa Rica | |
| 2 | Medellín | 🇨🇴 Colombia | |
| 3 | Guayaquil | 🇪🇨 Ecuador | |
| 4 | Cali | 🇨🇴 Colombia | |
| 5 | Guatemala City | 🇬🇹 Guatemala | |
| 6 | Mexico City | 🇲🇽 México |
Rare
Under 5% of wildlife watchers report a Chestnut-collared Swift sighting in San José on a given day, based on 286 verified sightings from GBIF citizen-science data. It is the 132nd most-seen of the 379 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Chestnut-collared Swift in San José on a given day, so our monthly data shows no clear season.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Chestnut-collared Swift sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 6 cities where we can rate Chestnut-collared Swift sightings, San José has the highest daily chance: under 5%. Next come Medellín (Colombia, under 5%) and Guayaquil (Ecuador, under 5%).
GBIF citizen-science records
It is estimated from how often the Chestnut-collared Swift is recorded against all the birds logged in San José (286 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.
