How does the Eurasian Wryneck advertise territory, contrasting with the practice of most true woodpeckers?

By relying almost exclusively on vocal calls transcribed as *klee-klee-klee* or *kee-kee-kee*.

A significant behavioral difference between the wryneck and many other species in the Picidae family lies in territorial communication. While true woodpeckers commonly use percussive drumming on wood to establish boundaries or attract mates, wrynecks rarely, if ever, engage in this behavior. Instead, their primary method for communication across the forest during the breeding season is acoustic. The Eurasian Wryneck produces a distinct call described as loud, clear, ringing, and slightly metallic, often rendered as *klee-klee-klee*. This vocalization carries effectively through the woods, serving as their main territorial advertisement.