Hemiprocne coronata
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~40%
The crested treeswift (Hemiprocne coronata) is a species of tree swift. It was for some time considered the same species as its eastern relative, the gray-rumped treeswift (Hemiprocne longipennis), but they do not interbreed where their ranges overlap. It is distinct in flight, with long, bowed wings and a deeply forked tail that usually appears narrow and pointed.
The crested treeswift is a large slender bird at 23 cm (9 in) length. This species is dove grey above and white below. The long swept-back wings are a darker grey above. This treeswift has a crest and a long, deeply forked tail. The adult male has orange cheeks and ear coverts with a narrow streak of white under the eye and a trace of a white supercilium. The female also has a thin white stripe below the eye running below the grey cheek and ear coverts. Young birds have a dark grey head and wings but the feathers are edged in white and the rest of the soft plumage is much streakier than that of the adults. They are found in small groups that fly in wide circles in open forest, occasionally perching atop a tall and leafless tree. When perched they appear to sit very upright.
The call of this species is a... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yala National Park | 🇱🇰 Sri Lanka | |
| 2 | Wilpattu National Park | 🇱🇰 Sri Lanka | |
| 3 | Udawalawe National Park | 🇱🇰 Sri Lanka | |
| 4 | Mudumalai National Park | 🇮🇳 India | |
| 5 | Bandhavgarh National Park | 🇮🇳 India | |
| 6 | Bandipur National Park | 🇮🇳 India | |
| 7 | Minneriya National Park | 🇱🇰 Sri Lanka | |
| 8 | Kanha National Park | 🇮🇳 India | |
| 9 | Jim Corbett National Park | 🇮🇳 India | |
| 10 | Gir National Park | 🇮🇳 India | |
| 11 | Satpura National Park | 🇮🇳 India | |
| 12 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka | |
| 13 | Nagarhole National Park | 🇮🇳 India | |
| 14 | Chitwan National Park | 🇳🇵 Nepal | |
| 15 | Royal Bardia National Park | 🇳🇵 Nepal | |
| 16 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 17 | Periyar National Park | 🇮🇳 India | |
| 18 | Manas National Park | 🇮🇳 India | |
| 19 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 20 | Khao Yai National Park | 🇹🇭 Thailand | |
| 21 | Cat Tien National Park | 🇻🇳 Vietnam |
With luck
About 10% of wildlife watchers report a Crested Treeswift sighting in Royal Bardia National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 143rd most-seen of the 233 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
March–May, October and December–January
In those months about 10% of wildlife watchers report a Crested Treeswift in Royal Bardia National Park on a given day, against under 5% in February, June–July, September and November, the lowest months. Those are among Royal Bardia National Park's driest months, with about 40 mm of rain a month against 590 mm in July. August has too few records to rate.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Crested Treeswift 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.
15th of 21
Of the 21 parks where we can rate Crested Treeswift sightings, Royal Bardia National Park ranks 15th at about 10%. The best odds are in Yala National Park (Sri Lanka, about 50%), Wilpattu National Park (Sri Lanka, about 40%) and Udawalawe National Park (Sri Lanka, about 30%). All parks ranked.
Same order: Apodiformes
The closest relatives of the Crested Treeswift that you can see in Royal Bardia National Park (order Apodiformes, Swifts and Hummingbirds) are White-rumped Needletail (about 10%) and House Swift (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Crested Treeswift is recorded against all the birds logged in Royal Bardia National Park (23 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.
