Petrochelidon rufocollaris
In 3 days ~10% in a week ~20%
The chestnut-collared swallow (Petrochelidon rufocollaris) is a species of bird in the family Hirundinidae, the swallows and martins. It is found in Ecuador and Peru. The chestnut-collared swallow was originally described as Hirundo rufocollaris in Titian Peale's catalog of birds collected during the United States Exploring Expedition. It was later reclassified in its current genus Petrochelidon that had been erected in 1851. Some authors have treated it as a subspecies of the cave swallow (P. fulva) and the two form a superspecies.
The chestnut-collared swallow is 12 to 12.5 cm (4.7 to 4.9 in) long and weighs 14 to 18 g (0.49 to 0.63 oz). Both sexes of both subspecies have essentially the same plumage. Adults have a dark chestnut forecrown and hindneck. Their crown and back are glossy blue-black with white streaks on the mantle and their rump is chestnut. Their ear coverts and throat are white that sometimes has a buff tinge. Their wings and tail are blackish brown. Their underparts are partially white... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Chestnut-collared Swallow sighting in Guayaquil on a given day, based on 22 verified sightings from GBIF citizen-science data. It is the 107th most-seen of the 167 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
April and May
In those months about 10% of wildlife watchers report a Chestnut-collared Swallow in Guayaquil on a given day, against under 5% in June to March, the lowest months.
Yes
Of the 2 cities where we can rate Chestnut-collared Swallow sightings, Guayaquil has the highest daily chance: under 5%. Next come Lima (Peru, under 5%).
Same family: Hirundinidae
The closest relatives of the Chestnut-collared Swallow that you can see in Guayaquil (family Hirundinidae, Swallows and Martins) are Gray-breasted Martin (about 40%), Blue-and-white Swallow (about 40%) and Southern Rough-winged Swallow (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chestnut-collared Swallow is recorded against all the birds logged in Guayaquil (22 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.
