Rabbits do not make a sound, and giraffes do not either, at least one that humans can hear. Other creatures like coyotes, elks, ravens, geese, donkeys, and turkeys. cougars, barn owls, and bobcats ...

Scientists have finally managed to record the ear-piercing screams that a frog in the Amazon rainforest makes to defend against predators. It’s the first reported case of the use of ultrasound ...