Links to Portuguese and Galician dialect samples

Comparison between Galician, North Portuguese and Brazilian pronunciations of the same sayings.
Galician dialects from the West, East and center of Galicia.
Dialects from various regions of Portugal.
What struck me here that the dialects from the North of Portugal, even close to the Spanish (Galician) border, like from Castro Laboreiro for example, are so close to standard European Portuguese, and seem rather different from Galician. They don't have the merging of /S/ and /Z/ (<x> is one orthography of Galician) and /s/ and /z/).