Where to Find and Catch Ledian
From Pokemon Go Wiki
Ledian are found and captured in Nest and Habitat locations.
Nests
Ledian Nests are locations that consistently spawn Ledian.
Habitats
Ledian Habitats are spawn locations where Ledian is likely to be encountered, but not guaranteed the way a Nest is.
Additional Tips and Information
Best Nests
If you know a really good nest or any of the nests above is really good, list them here: