Which is the best park to see a Gadwall?
Keoladeo National Park
In Keoladeo National Park, India, about 50% of wildlife watchers report a Gadwall sighting on a given day, the highest of the 14 parks where we can rate it, from GBIF citizen-science data.
Where else can you see a Gadwall?
Hortobágy National Park and more
After Keoladeo National Park, the next-best odds of seeing a Gadwall are in Hortobágy National Park (Hungary, about 50%), Elk Island National Park (Canada, about 50%) and Channel Islands National Park (United States, about 40%). Outside Asia, the best options are Hortobágy National Park in Europe (about 50%) and Elk Island National Park in North America (about 50%).
When is the best time to see a Gadwall?
It depends on the park
In the top parks, the best months are January and February in Keoladeo National Park (about 70%), September and October in Hortobágy National Park (about 60%) and June and October in Elk Island National Park (about 60%), as the share of wildlife watchers who report a Gadwall on a given day. Each park's Gadwall page has the full month-by-month chart.