From Nookipedia, the Animal Crossing wiki
The Cricket (コオロギ, Kōrogi) is a common insect in the Animal Crossing series. It can be found in autumn, between the months of September and November. They are sold for 130 bells. It can be found in bushes in Doubutsu no Mori and Animal Crossing, where players have to scare the Cricket so it can be easily caught. In Wild World, City Folk and New Leaf, it can be found on the ground.
Donating to the Museum
In Animal Crossing
"I actually find their voices quite soothing. On an autumn evening, when their cries fill the air... Delightful! Their appearance however, is not in the least bit engaging, and actually borders on repugnant. As for myself, I find them no better than cockroaches. Blech! Vile. Vile indeed. Truly, dirtily vile, eh wot?"
In Wild World
"Hoo! Well. That IS a lovely sound, now isn't it? Indeed. I wonder if I'm the only one to mistake these things for roaches... I suppose the only sound I've ever heard as roach make is "squish.""
In City Folk
"Ah, hoo...indeed. Crickets do have a lovely chirp, I must grudgingly admit. Still, that black body, those long feelers... How do people love these when they resemble...THOSE? I bet one couldn't even tell the difference between a cricket and a cockroach in the dark of night..."
The Cricket is located on the second tier of the insect section, in the area just above the ramp from the first level.
In New Leaf
Blathers no longer comments on the Cricket. "The chirping sound you often hear from male crickets is emitted by the stridulation of their wings. Crickets' ears are located just below the middle joint of each front leg. While this seems odd to us, it helps them easily pinpoint where various sounds are coming from."
When the player has caught the Cricket, they can find information about the insect in the bug menu. Below is the information regarding the Cricket:
The house cricket is a common cricket found worldwide, but native to Southwestern Asia. They commonly invade homes in search of food and ideal environments such as warmth and moisture, and may be considered pests due to their incessant singing and eating fabrics. Their singing is caused by their rubbing their forewings. Only the males sing, and their singing attracts mates. All crickets caught in Animal Crossing are therefore male. They are commercially bred for pet food and are kept as pets themselves. In some areas of the world, it is a delicacy and is eaten as a snack.