Nintendo has been tinkering with the spawn rates of a number of our favourite money-making bugs, including Emperor and Peacock butterflies, Atlas moths, scorpions, and tarantulas.
As detailed by data miner @_Ninji (thanks, Polygon) - who has been correct about changes in the past - Nintendo has reportedly unified the spawn rates of bugs and insects so that rather than popping up more often in certain months of the year, they'll now have the same spawn rate across every month they're scheduled to appear.
"Agrias butterfly used to be less common in April than in its other available months. Wharf roach had a higher rate in March," Ninji explained. "Peacock butterflies have been cut by 80-90%; emperors and atlas moths by 50%. Regular stinkbugs are up 100%, man-faced ones down 50%. Tiger beetles up by 33%, Scarab beetles down 40%.