Hirundapus cochinchinensis
Silhouette: Aviceda (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~10% in a week ~30%
The silver-backed needletail (Hirundapus cochinchinensis) is a species of swift in the family Apodidae. It is found in Southeast Asia, Sumatra, Java and Taiwan. It is a vagrant to Christmas Island. Its natural habitat is subtropical or tropical moist lowland forests. Wikipedia →
Flight call0:16
Taiwan · 1983
© Jelle Scharringa · XC611446 · CC BY-NC-SA 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 2 | Khao Yai National Park | 🇹🇭 Thailand | |
| 3 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 4 | Chitwan National Park | 🇳🇵 Nepal | |
| 5 | Namdapha National Park | 🇮🇳 India | |
| 6 | Taroko National Park | 🇹🇼 Taiwan | |
| 7 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 8 | Kaeng Krachan National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Singapore | 🇸🇬 Singapore |
Rare
Under 5% of wildlife watchers report a Silver-backed Needletail sighting in Khao Yai National Park on a given day, based on 87 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 160th most-seen of the 278 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
February and March
In those months about 10% of wildlife watchers report a Silver-backed Needletail in Khao Yai National Park on a given day, against under 5% in April to January, the lowest months. Those are among Khao Yai National Park's driest months, with about 70 mm of rain a month against 330 mm in September.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Silver-backed Needletail sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 8
Of the 8 parks where we can rate Silver-backed Needletail sightings, Khao Yai National Park ranks 2nd at under 5%. The best odds are in Cat Tien National Park (Vietnam, about 10%).
GBIF citizen-science records
It is estimated from how often the Silver-backed Needletail is recorded against all the birds logged in Khao Yai National Park (87 verified sightings from 2019 to 2026), 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.
