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