GrizEars is the acoustics workspace in GrizCam Desktop, our free software for turning field recordings into findings.

It opens audio from GrizCam devices, animal-borne biologger collars, and third-party recorders such as Wildlife Acoustics units, and it handles tens of thousands of files at once, even on a laptop. Annotate by hand, then train, validate, and run your own detectors on modern bioacoustic foundation models (Perch, AVES2), with no code.

Paired with GrizCam hardware, GrizEars hears more: each device records through a multi-microphone array, so GrizEars estimates the direction every sound came from, and an onboard compass turns that into a true bearing on the map. GPS and a battery-backed real-time clock keep each recording on an accurate shared timeline, so calls captured by neighboring devices line up to the second.

With biologger collars, GrizEars pairs the audio with the collar’s motion sensors (IMU) to reconstruct the animal’s path by dead reckoning, so you can follow it across the landscape and hear what it heard.

For product details, see grizcam.com.

Elk run; wolves follow.Photo: Doug Smith/NPS
From the air, a small group of elk runs across snow while several wolves follow behind.
Elk run; wolves follow.Photo by Doug Smith/NPS