CollarID
Hear What GPS Can't

The first wildlife collar with long-term acoustic monitoring. Field-proven across 5 species, 3 continents, and thousands of hours of data.

Acoustic Recordings

No other wildlife collar captures long-term audio in the field. CollarID's acoustic system — optimized with insights from acoustic experts at MIT and in industry — records what existing platforms miss entirely.

Hyena

STFT spectrogram of hyena

Hyena Running and Vocalizing

STFT spectrogram of hyena running and vocalizing

Research questions you can now answer

GPS tells you where an animal goes. CollarID tells you what it's doing, hearing, and breathing — in the field, at full duty cycle, for the length of the deployment.

Distinguish vocalizing-while-running from vocalizing-at-rest in spotted hyenas without behavioral inference.

Synchronized audio + IMU + GPS lets behavioral states emerge from direct multi-modal measurement, not from probabilistic classifiers built on movement alone.

Build acoustic training sets for species ML models from continuous field audio rather than triggered recorders.

Long-form recording at deployment timescales replaces the sampling bias of trigger-based capture — you get the rare events alongside the common ones.

Quantify wildfire smoke exposure on free-ranging animals and the behavior changes that follow.

On-animal particulate, gas, temperature, and humidity sensing — recorded against the same timeline as movement and vocalization, so you see exposure events and their behavioral consequences in one file.

150g

Total Weight

1000s

Hours of Field Audio

5

Species Deployed

3

Continents

Hardware Specifications

150 grams. Solar-powered. Built to survive a lion bite. Designed for years in the field, not weeks.

CollarID Mk II — assembled wildlife collar with integrated solar panel, sensors, and antennas

Engineered for the Field

A conventional research collar in this category weighs 1–2 kg, with most of that mass devoted to a battery large enough to sustain a roughly 4-hour GPS fix cadence over a year-long deployment. CollarID Mk II runs 150 g, on solar, at fix rates several times finer than convention.

150 g

Total weight, with multi-modal sensors and continuous bioacoustics — vs 1–2 kg typical for year-long collars.

5 min

Field-validated GPS + LoRaWAN uplink cadence, sustained over several months on free-grazing cattle — vs ~4 h convention.

Perpetual

Solar-augmented operation engineered for indefinite uptime; no battery-swap retrieval required.

That isn't battery chemistry magic. Every subsystem — radios, sensors, MCU duty cycles, file system, peripheral wake/sleep — has been individually power-budgeted and hand-tuned against its physical lower bound. The configurator's Power tab exposes the same per-subsystem energy equation the firmware uses, so you can preview the longevity of any deployment schedule before committing it.

The honest trade. The most expensive premium collars include satellite uplinks (Iridium, Globalstar) for zero-infrastructure deployments. CollarID currently uses LoRa / LoRaWAN, which requires terrestrial gateway coverage or a local base station at the deployment site. A modular satellite-uplink node and an automated drop-off mechanism are both in active development — the drop-off is currently in pilot testing.

Exploded view of the Mk I prototype shown here. Mk II carries the same enclosure architecture — polycarbonate cover, machined anodized-aluminum base, gasketed perimeter. The assembled Mk II is pictured at the top of this section.

Mechanical Housing

Designed for durability. Validated using Finite Element Analysis (FEA) against the bite force of a lion. Polycarbonate cover, machined anodized-aluminum base, EPDM gasket compressed by six perimeter screws — survived two consecutive cycles of pressurised warm-water spray with surfactant detergent in in-house testing, with no ingress or post-test degradation.

Finite Element Analysis

FEA simulations validate structural integrity, ensuring the device can withstand the physical demands of tracking wild animals like lions and hyenas.

In the Field

Deployed on wild and domestic species across Africa, South America, and North America. Every deployment generates real data and refines the platform.

Spotted Hyena — Botswana

Deployed November 2025 in collaboration with Rohan Wadhwa, wildlife ecologist and doctoral student at the University of Georgia, studying spotted hyena movement ecology and human-wildlife conflict mitigation. Collected 3 weeks of continuous nocturnal acoustic data.

CollarID deployed on spotted hyena in Botswana
CollarID deployed on spotted hyena in Botswana

Wildfire Prevention Goats — Chile

Two-week pilot with Buena Cabra and the MIT City Science Group, monitoring goat grazing behavior as a natural method for clearing dry wildfire fuel. Acoustic and IMU data captured feeding patterns to measure vegetation clearing effectiveness.

CollarID deployment on goats in Chile
CollarID on goat in Chile
CollarID on goat in Chile

Cattle — New York

Multi-month deployment in partnership with Northaven Pastures, including through winter conditions. Three collars tracked cattle behavior and environmental exposure across seasons.

CollarID deployment on cattle in New York

Community Dogs — Kenya

Pilot deployment on domestic dogs in indigenous communities, in collaboration with Stephanie Mitchell, doctoral candidate in Environmental Health Sciences at the University of Washington.

A New Lens on Life

CollarID began as a PhD thesis at the MIT Media Lab. It's now a field-proven platform shipping to researchers worldwide.

Origin

Designed by Patrick Chwalek, PhD, CollarID was developed at the MIT Media Lab in collaboration with Kioxia Corporation, MIT researchers, and in consultation with National Geographic and the broader ecology and conservation community.

The Mk I platform has been validated across multiple field deployments — from spotted hyenas in Botswana to cattle surviving New York winters. Every deployment has returned usable data and informed the next iteration.

Mk II: Production-Ready

The Mk II builds on thousands of hours of field data with an optimized system architecture, lower assembly cost, and a larger solar panel for extended autonomous operation. Units are now available for pilot deployments.

Proven Across 3 Continents

Africa, South America, North America

5 Species and Counting

Hyenas, goats, cattle, dogs — and more to come

Research-Grade

Built at MIT. Used by university researchers and conservation organizations.

Beyond the wild

The same multi-modal sensing that classifies a hyena's behavior in Botswana works on animals closer to home. Researchers and operators have explored CollarID for equine activity and sleep patterns, working-dog welfare across shift cycles, and livestock behavioral signals around heat stress, parturition, or husbandry events.

If you have a working-animal application that off-the-shelf trackers can't cover — and you can describe the question in research terms — we'd like to hear from you.

Deploy CollarID

Whether you're a researcher, conservation organization, or funder — we'd like to hear from you. Mk II units are available for pilot deployments.

Get in Touch