Which is the best park to see a Crested Treeswift?
Yala National Park
In Yala National Park, Sri Lanka, about 50% of wildlife watchers report a Crested Treeswift sighting on a given day, the highest of the 11 parks where we can rate it, from GBIF citizen-science data.
Where else can you see a Crested Treeswift?
Wilpattu National Park and more
After Yala National Park, the next-best odds of seeing a Crested Treeswift are in Wilpattu National Park (Sri Lanka, about 40%), Udawalawe National Park (Sri Lanka, about 30%) and Mudumalai National Park (India, about 30%).
When is the best time to see a Crested Treeswift?
It depends on the park
In the top parks, the best months are November in Yala National Park (about 70%), November in Wilpattu National Park (about 60%) and January and July in Udawalawe National Park (about 40%), as the share of wildlife watchers who report a Crested Treeswift on a given day. Each park's Crested Treeswift page has the full month-by-month chart.