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