the name of the birds are :-
- Moltres and,
There is an official announcement on the twitter that, the moltres will available for the players from 31 July to 7 August and, The zapdos will be available from 7 August to 14 August.
The Pokemon go recently got the first legendary monsters, Lugia and Articuno were added via an update after Pokemon Go Fest in Chicago last weekend.
This update will come to Generate a new energy in the game.