Woodpecker singing

Woodpecker drumming

ΒΙΒΛΙΟΓΡΑΦΙΑ-ΠΗΓΕΣ Bock, W. J. & DeWitt Miller, W. (1959). The Scansorial Foot of

the Woodpeckers, with Comments on the Evolution of Perching and Climbing Feet in Birds. American Museum Novitates, No. 1931, www address: http://digitallibrary.amnh.org/handle/2246/5316 

Sartori, B. (2014). Let's Learn About… WOODPECKERS, Kindle Edition.

Shunk, S. (2016). Peterson Reference Guide to Woodpeckers of North America (Peterson Reference Guides). Houghton

Mifflin Harcourt. Kindle Edition. ....και πολλά βίντεο στο Youtube