Bugs/Doubutsu no Mori e+/September
From Nookipedia, the Animal Crossing wiki
The following is a list of bugs in Doubutsu no Mori e+ that are available during September. Note that this applies only to bugs that are part of the mainland, and not on Animal Island.
September bugs in Doubutsu no Mori e+
New in September
Leaving after September
Bugs leaving after September in Doubutsu no Mori e+