Which is the best park to see an Old World Swallowtail?
Gobi Gurvansaikhan National Park
In Gobi Gurvansaikhan National Park, Mongolia, about 50% of wildlife watchers report an Old World Swallowtail sighting on a given day, the highest of the 16 parks where we can rate it, from GBIF citizen-science data.
Where else can you see an Old World Swallowtail?
Triglav National Park and more
After Gobi Gurvansaikhan National Park, the next-best odds of seeing an Old World Swallowtail are in Triglav National Park (Slovenia, about 40%), Mercantour National Park (France, about 30%) and Vanoise National Park (France, about 30%). Outside Asia, the best options are Triglav National Park in Europe (about 40%) and Wrangell-St. Elias National Park in North America (about 30%).
When is the best time to see an Old World Swallowtail?
It depends on the park
In the top parks, the best months are April in Triglav National Park (about 50%) and April and June–July in Mercantour National Park (about 40%), as the share of wildlife watchers who report an Old World Swallowtail on a given day. Each park's Old World Swallowtail page has the full month-by-month chart.