Epigamic

Epigamic \ep-i-GAM-ik\ , adjective;
1. Attracting the opposite sex, as the colors or certain birds

You've got nothing on this guy (credit)

This word is first attested in 1890 and comes from Greek epigamoz ("marriageable"), which is a combination of epi + gamoz ("upon" + "marriage").

*note: The Greek word is written ἐπίγάμος. I may have transliterated incorrectly.

Today's word and the first definition were both taken from Dictionary.com's 'Word of the Day' for Thursday, May 5
Etymologies come from the Oxford English Dictionary and/or Etymonline.com