Birds of a Feather

From the RIGHT to LEFT:

Owlman 1 ( Batman: The Brave and Bold [TV Series])

Owlman 2 (New 52: Forever Evil, Thomas Wayne, Jr.)

Owlman 3 (Lincoln March/Thomas Wayne Jr., Court of Owls)

Owlman 4 (Retro Version, Earth Three)

Owlman 5 (Crime Society Earth 3 Style [Countdown])

Owlman 6 (New Earth Style, Roy Raymond Jr.)

Owlman 7 (Justice League: Crisis of Two Earths Style)

Owlman 8 (Based on Earth 2, Crime Syndicate and Anti-Matter Style)