Niantic, the developer of Pokémon GO, has recently announced the Legendary Flight event for Trainers old and new to participate in. The latest in the Dual Destiny season, this is an ongoing event spanning multiple weeks. The main perks of this one are that, along with being focused around the three legendary birds, Pocket Monsters, Articuno, Zapdos, and Moltres, you’ll be able to take them on with an emphasis on the game’s latest twist mechanic.

https://screenrant.com/pokemon-go-legendary-flight-event-schedule/