Pricuricu

Picture from Paranormal Animals of North America

The Pricuricu (Hylocichla cynophilus) is a small, thrush-like bird with large, night adapted eyes, like an owl's. Night-hunting insectivores, their calls are high-pitched, beyond the range of normal hearing, although large flocks calling at the same time can cause great pain in creatures that can hear their ultrasound cries.