Grey-headed Woodpecker, Picus canus "Grey-headed Woodpecker (Picus canus), Białowieża, Poland" by Frank.Vassen via Flickr, Creative Commons Attribution.

Green Woodpecker, Picus viridis "✿ Picus viridis ✿" by ✿ nicolas_gent ✿ via Flickr, Creative Commons Attribution-NoDerivs.

Taxonomy:

Picus awokera awokera (Add)
Picus awokera horii (Add)
Picus awokera takatsukasae (Add)

Grey-headed Woodpecker, Picus canus

Picus canus biedermanni (Add)
Picus canus brunneatus (Add)
Picus canus canus (Add)
Picus canus dedemi (Add)
Picus canus griseoviridis (Add)
Picus canus guerini (Add)
Picus canus hessei (Add)
Picus canus jessoensis (Add)
Picus canus kogo (Add)
Picus canus robinsoni (Add)
Picus canus sanguiniceps (Add)
Picus canus sobrinus (Add)
Picus canus sordidior (Add)
Picus canus tancolo (Add)

Picus chlorolophus annamensis (Add)
Picus chlorolophus chlorigaster (Add)
Picus chlorolophus chlorolophus (Add)
Picus chlorolophus citrinocristatus (Add)
Picus chlorolophus laotianus (Add)
Picus chlorolophus longipennis (Add)
Picus chlorolophus rodgersi (Add)
Picus chlorolophus simlae (Add)
Picus chlorolophus vanheysti (Add)
Picus chlorolophus wellsi (Add)

Picus erythropygius erythropygius (Add)
Picus erythropygius nigrigenis (Add)

Picus flavinucha flavinucha (Add)
Picus flavinucha korinchi (Add)
Picus flavinucha kumaonensis (Add)
Picus flavinucha lylei (Add)
Picus flavinucha marianae (Add)
Picus flavinucha mystacalis (Add)
Picus flavinucha pierrei (Add)
Picus flavinucha ricketti (Add)
Picus flavinucha styani (Add)
Picus flavinucha wrayi (Add)

Picus mentalis humei (Add)
Picus mentalis mentalis (Add)

Picus miniaceus malaccensis (Add)
Picus miniaceus miniaceus (Add)
Picus miniaceus niasensis (Add)
Picus miniaceus perlutus (Add)

Picus puniceus observandus (Add)
Picus puniceus puniceus (Add)
Picus puniceus soligae (Add)

Picus squamatus flavirostris (Add)
Picus squamatus squamatus (Add)

Picus viridanus viridanus (Add)
Picus viridanus weberi (Add)

Green Woodpecker, Picus viridis

Picus viridis bampurensis (Add)
Picus viridis innominatus (Add)
Picus viridis karelini (Add)
Picus viridis sharpei (Add)
Picus viridis viridis (Add)

Picus vittatus connectens (Add)
Picus vittatus eisenhoferi (Add)
Picus vittatus eurous (Add)
Picus vittatus limitans (Add)
Picus vittatus vittatus (Add)

Picus xanthopygaeus myrmecophoneus (Add)