Where to Find and Catch Drapion
From Pokemon Go Wiki
Drapion are found and captured in Nest and Habitat locations.
Nests
Drapion Nests are locations that consistently spawn Drapion.
Habitats
Drapion Habitats are spawn locations where Drapion 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: