Hirundo javanica
Silhouette: Matt Wilkins · PhyloPic
In 3 days ~40% in a week ~70%
The Pacific swallow (Hirundo javanica) is a small passerine bird in the swallow family Hirundinidae. It breeds in tropical southern Asia and the islands of the south Pacific. It is resident apart from some local seasonal movements. This bird is associated with coasts, but is increasingly spreading to forested uplands. It was formerly treated as conspecific with hill swallow, the welcome swallow and the Tahiti swallow.
The Pacific swallow was formally described and illustrated in 1789 by the Swedish naturalist Anders Sparrman based on a specimen collected on the Indonesian island of Java. He coined the binomial name Hirundo javanica. The Pacific swallow was formerly considered to be conspecific with the Tahiti swallow (Hirundo tahitica). The species were split based on the differences in morphology. Wikipedia →
Recording0:21
Indonesia · 2022
© Meynard Dinesh · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kinabatangan Wildlife Sanctuary | 🇲🇾 Malaysia | |
| 2 | Raja Ampat | 🇮🇩 Indonesia | |
| 3 | Komodo National Park | 🇮🇩 Indonesia | |
| 4 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 5 | Sepilok | 🇲🇾 Malaysia | |
| 6 | Tanjung Puting National Park | 🇮🇩 Indonesia | |
| 7 | Bako National Park | 🇲🇾 Malaysia | |
| 8 | Khao Sok National Park | 🇹🇭 Thailand | |
| 9 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 10 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 11 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 12 | Taroko National Park | 🇹🇼 Taiwan | |
| 13 | Kinabalu Park | 🇲🇾 Malaysia | |
| 14 | Way Kambas National Park | 🇮🇩 Indonesia | |
| 15 | Tangkoko Nature Reserve | 🇮🇩 Indonesia | |
| 16 | Bali Barat National Park | 🇮🇩 Indonesia | |
| 17 | Khao Luang National Park | 🇹🇭 Thailand | |
| 18 | Kaeng Krachan National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taichung | 🇹🇼 Taiwan | |
| 2 | Kaohsiung | 🇹🇼 Taiwan | |
| 3 | Manila | 🇵🇭 Philippines | |
| 4 | Denpasar | 🇮🇩 Indonesia | |
| 5 | Davao City | 🇵🇭 Philippines | |
| 6 | Tainan | 🇹🇼 Taiwan | |
| 7 | Kuching | 🇲🇾 Malaysia | |
| 8 | Makassar | 🇮🇩 Indonesia | |
| 9 | Yogyakarta | 🇮🇩 Indonesia | |
| 10 | Jakarta | 🇮🇩 Indonesia |
Possible
About 20% of wildlife watchers report a Pacific Swallow sighting in Surabaya on a given day, based on 17 verified sightings from GBIF citizen-science data. It is the 11th most-seen of the 27 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
May
In that month about 30% of wildlife watchers report a Pacific Swallow in Surabaya on a given day, against about 10% in September and November–January, the lowest months. April and June have too few records to rate.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Pacific Swallow sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
20th of 23
Of the 23 cities where we can rate Pacific Swallow sightings, Surabaya ranks 20th at about 20%. The best odds are in Taichung (Taiwan, about 70%), Kaohsiung (Taiwan, about 60%) and Manila (Philippines, about 50%).
Same order: Passeriformes
The closest relatives of the Pacific Swallow that you can see in Surabaya (order Passeriformes, Perching Birds) are Nutmeg Mannikin (about 20%), Eurasian Tree Sparrow (about 20%) and White-headed Munia (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pacific Swallow is recorded against all the birds logged in Surabaya (17 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.
