Board Thread:News and Announcements/@comment-29432775-20160804020339

According to a lot of sources, the Legendary Trio (Articuno, Zapdos, and Moltres) are #144, #145, and #146. Dratini is #147, and as we saw in the last update, instead of changing Dratini nests down one like all other nests into the Legendary birds, they changed to Eevees.

This confirms that Niantic is preserving the Legendary birds for later use... 