What is Swarming Pidgey?
Swarming Pidgey was a special event that occurred on August 3, 2019. The challenge was to capture as many swarming Pidgey as you can by the end of the time limit. The event started at 12 am on August 3, 2019 and ended at 12 am on August 4, 2019.
During the event, escaped Pidgey randomly appeared on pages of the RPG. Upon spotting one, you can click the image. A page appears with a captcha code. After entering the correct code, the Pidgey is logged as being caught by you. Rankings can be checked along with the number of Pidgey logged under the Swarming Pokémon tab in Challenges.
The Pidgey will look like this: 
Prizes were distributed based on the rankings at 12 am on August 4, 2019.