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My moon's not great, but I'll try my best.
>From left to right, Pokemon Red/Green official art, Pokemon Blue official art, FR/LG official art, and the anime designs.
>"In this game, Pidgeotto is consistently drawn with 3 talons."
>"The wings have become more detailed since the remakes."
>"Anime goods up until XY were supervised to have 4 talons."
>"Fearow's wings became more detailed since the remakes."
>"In this game there are many graphics depicting it with 4 talons, it became the uniform design at the time of the remakes."
>"In the anime design, they took some liberties with the details because of the huge amount of work."
It's just showing off some differences between the designs over the years, sorry if I messed up anywhere.