World Bird List

Species factsheet
Checkered Woodpecker (Veniliornis mixtus)

Order: Veniliornis mixtus
Family: Woodpeckers (Picidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
cancellatus se Brazil
mixtus e Paraguay, Uruguay and ne Argentina
malleator Chaco region of se Bolivia, w Paraguay and n Argentina
berlepschi wc and c Argentina