Which animal can make highest pitched sound?

The animal known to produce the highest-pitched sound is the male white-crowned sparrow, which can emit calls reaching frequencies up to 9 kHz. However, among all animals, the male of the species known as the "Screech Owl" can also produce extremely high-pitched sounds. Additionally, certain species of bats, like the common pipistrelle, are capable of emitting ultrasonic calls that exceed 100 kHz, making them some of the highest-pitched sound producers in the animal kingdom.