Sometimes cards are reprinted without being actual "reprints;" the new cards have the same functionality as the old ones, but different names. (Meaning you could use four of each in a deck.)
Two of Odyssey's Aven are just such cards. Aven Cloudchaser and Aven Fisher are descended from Tempest's Cloudchaser Eagle and Urza's Destiny's Kingfisher, respectively. Both new cards pay homage to the old ones not only in name, but also subtly in their art (the speared fish being the most obvious link).