Delichon dasypus
Silhouette: Andy Wilson · PhyloPic
In 3 days ~50% in a week ~80%
The Asian house martin (Delichon dasypus) is a migratory passerine bird of the swallow family Hirundinidae. It has mainly blue-black upperparts, other than its white rump, and has pale grey underparts. Its three subspecies breed in the Himalayas and in central and eastern Asia, and spend the winter lower in the mountains or in Southeast Asia. This species is locally abundant and is expanding northward in Siberia, so there are no concerns about its conservation status.
This martin breeds in colonies, building mud nests under an overhang on a vertical cliff or the wall of a building. Both sexes build the nest, incubate the three or four white eggs and feed the chicks. The Asian house martin feeds on small insects taken in flight, usually caught high in the air. The presence of terrestrial springtails and Lepidoptera larvae in its diet indicates that food is sometimes picked from the ground.
The Asian house martin was first formally described from a bird collected in Borneo by French naturalist and ornithologist Charles Lucien Bonaparte in 1850 as Chelidon dasypus, shortly before it was moved to the new genus Delichon by British entomologist Frederic Moore and American naturalist... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan | |
| 2 | Nikko National Park | 🇯🇵 Japan | |
| 3 | Jiuzhaigou National Park | 🇨🇳 China | |
| 4 | Langtang National Park | 🇳🇵 Nepal | |
| 5 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 6 | Khao Yai National Park | 🇹🇭 Thailand | |
| 7 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 8 | Namdapha National Park | 🇮🇳 India | |
| 9 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 10 | Manas National Park | 🇮🇳 India | |
| 11 | Cat Tien National Park | 🇻🇳 Vietnam |
Possible
About 20% of wildlife watchers report an Asian House Martin sighting in Jiuzhaigou National Park on a given day, based on 30 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 46th most-seen of the 131 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
May
In that month about 40% of wildlife watchers report an Asian House Martin in Jiuzhaigou National Park on a given day, against about 10% in June to December, the lowest months. That is one of Jiuzhaigou National Park's wettest months, with about 150 mm of rain against 15 mm in December. January to March have too few records to rate.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most Asian House Martin sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is most active around dawn and dusk.
3rd of 11
Of the 11 parks where we can rate Asian House Martin sightings, Jiuzhaigou National Park ranks 3rd at about 20%. The best odds are in Taroko National Park (Taiwan, about 50%) and Nikko National Park (Japan, about 20%).
GBIF citizen-science records
It is estimated from how often the Asian House Martin is recorded against all the birds logged in Jiuzhaigou National Park (30 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.
