I have been looking for an anime for about 15 years. I originally watched it on a French channel called "Mangas". the anime itself probably dates from between 1980-2000.
The anime had similar points with Saint Seya, namely that a team of heroes would wear (or more like transform) into robots / armored fighter. There were around a dozen characters each with a specific transformation, among which one had parrot-like armor with green and orange feather-like scales.
The most important clue I can remember is that all those transforming characters had an eye tattoo on their forearm (right forearm I think, usually covered up in bandages) which would open as the character was say something along the lines of
"By the power of the eye" ("Par le pouvoir de l'oeil" in the French version).