It means exactly what it says. A cricket's ears ARE on its knees.
Crickets hear though their knees ! (Yeah - strange but TRUE !)
There are no insects with eyes on their knees. However, there are many kinds of insects with ears on their knees. Some examples include crickets and grasshoppers.
The chirp is made by rubbing their left forewing against their right forewing.
they rub their knees together they use this as a mating call
they rub their knees together they use this as a mating call
They have ears on their "knees" or where they bend their hind legs.
Because they are inbreed give or take.
Just below the "knees" of the front legs.
A cricket's ears are on its front legs, just below the knees and they have four acoustic inputs.
get on your knees. hand her a flower. whisper softly in her ear. . . "lets zumba"
on one's / its knees, a.in a supplicatory position or manner: I came to him on my knees for the money. b.in a desperate or declining condition: The country's economy is on its knees.
The LITERAL meaning would be a flea in your ear! But "a flea in your ear" is an idiom, a saying, and it is not normally used literally.