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