Collocalia linchi
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In 3 days >90%
The cave swiftlet or linchi swiftlet (Collocalia linchi) is a species of swift in the family Apodidae. It is found on the Indonesia islands of Sumatra, Java and Bali. It is a woodland species and nests in caves. The Bornean swiftlet was considered a subspecies, but is now usually considered distinct.
The cave swiftlet was described by the naturalists Thomas Horsfield and Frederic Moore in 1854 under the present binomial name Collocalia linchi. The specific epithet linchi is the Javanese word for a swiftlet. There are four recognised subspecies:
This bird is shiny blackish-brown above with a greenish gloss, including its rump; sometimes looks black and hooded. Chest black; belly to flanks pale grey with fine black speckles at margins. Wing tips are rounded; underwing is black. Tail black, rounded with shallow notch but lacking the white specks found in the very similar glossy swiftlet... Wikipedia →
Call1:08
Indonesia · 2001
© Jelle Scharringa · XC777099 · CC BY-NC-SA 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bali Barat National Park | 🇮🇩 Indonesia |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yogyakarta | 🇮🇩 Indonesia | |
| 2 | Jakarta | 🇮🇩 Indonesia | |
| 3 | Denpasar | 🇮🇩 Indonesia | |
| 4 | Tasikmalaya | 🇮🇩 Indonesia | |
| 5 | Malang | 🇮🇩 Indonesia | |
| 6 | Semarang | 🇮🇩 Indonesia | |
| 7 | Bandung | 🇮🇩 Indonesia | |
| 8 | Surabaya | 🇮🇩 Indonesia |
Very likely
About 90% of wildlife watchers report a Cave Swiftlet sighting in Yogyakarta on a given day, based on 177 verified sightings from GBIF citizen-science data. It is the 2nd most-seen of the 42 birds we can rate there. Over three days the chance rises to over 90%, if each day is a fresh chance.
July
In that month over 90% of wildlife watchers report a Cave Swiftlet in Yogyakarta on a given day, against about 50% in February and April, the lowest months. That is one of Yogyakarta's driest months, with about 55 mm of rain against 350 mm in January.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Cave Swiftlet sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Yes
Of the 8 cities where we can rate Cave Swiftlet sightings, Yogyakarta has the highest daily chance: about 90%. Next come Jakarta (Indonesia, about 90%) and Denpasar (Indonesia, about 80%).
Same family: Apodidae
The closest relatives of the Cave Swiftlet that you can see in Yogyakarta (family Apodidae, Swifts) are House Swift (about 40%), White-nest Swiftlet (about 10%) and Black-nest Swiftlet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cave Swiftlet is recorded against all the birds logged in Yogyakarta (177 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.
