Cicada shell

The cicada shell is a bug in the introduced in. By definition, it is the exoskeleton left behind by a cicada nymph, making it the only bug in the series that is not living. The cicada shell can be found on trees all day from mid to late summer. Unlike other bugs, the player can run or walk past the tree without scaring the cicada shell away. The only way to make the bug disappear is to shake the tree or hit the tree with an axe, causing it to drop to the ground and disappear.

Donating to the museum
As with all insects in the Animal Crossing series, cicada shells can be donated to the museum followed by a small talk by Blathers, the curator.

In
It can be found in the top section of the upper right room in the bug habitat of the museum, with the other cicadas.

In
Once donated, the cicada shell can be found on the trees right in front of the entrance to the bug exhibit. They are also found in the second room nearby where ants are located, which may be referencing the 17-year periodical cicadas.