Now reformed and busy impressing new and older fans on the international touring circuit, Radio Birdman – an early punk-era act formed by Australian surfer-turned-rocker Rob Younger on vocals and American rocker-turned-surgeon Deniz Tek on guitar – return to Greece for a second successive year this week with shows scheduled for Thessaloniki’s Principal Club on Friday and the An Club in Athens the following evening. Based in Sydney, Radio Birdman formed in 1974 and took their cue from two high-energy American acts, MC5 and the Stooges. The band’s first round of activity fell apart in 1981 not long after the act’s second album, «Living Eyes,» which followed 1978’s «Radios Appear,» a record whose style, which came to be known as the «Australian sound,» influenced numerous acts both domestically and beyond. The act’s original lineup regrouped in 1996 for festival appearances in Australia and took it a step further last year with the release of a new album, «Zeno Beach.» Reflecting the worldwide demand for the proto-punk band, the comeback tour’s itinerary, about two-and-a-half months long, includes over 40 dates. Radio Birdman’s previous show in Athens last year, which was the band’s first here, sold out.