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ACT Avian Coded Tags

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  • Overview
  • Features
  • Applications
  • Specifications
  • Product Sheet
 Wilson’s Snipe

Simultaneous monitoring of your Birds & Bats with coded radio tags from 1.1g


Why use coded radio tags?

Coded radio tags send codes rather than simple beeps, meaning that hundreds of tags can share the same frequency but still be individually distinguished by their codes. For datalogging studies this avoids the need to scan through individual frequencies in turn (as with traditional beeper radio tags), reducing the chance of missing a detection by the receiver listening on the wrong frequency when an animal is present. Having multiple tags on the same frequency also means that more frequencies are available for other researchers, reducing congestion at busy study sites.

  Theoretical bird migrations detected on the Motus array


  • Hundreds of transmitters on a single frequency
  • Individually identifiable codes
  • Delayed start and advanced scheduling available
  • Strong, flexible, non-kinking antenna
  • Magnet activation and deactivation
  • Compatible with any SRX receiver configured for coded tags

Continental Scale Coded Radio Tracking

The Motus Wildlife Tracking System (Motus) is a coordinated collaborative research network that uses coded tags to track wildlife movements at local, regional, and even hemispheric scales. For more information see

 Eastern Bluebird

Coded radio tag applications

Flyway Studies - automated logging of birds or bats flying through area

Migration Stopover Ecology - record when your tagged animals are present

Colony Nesting Studies - log all parental feeding visits automatically

Flight Searches - save time while searching by only listening to one frequency

Bat Roost Behaviour - detect Bats leaving and returning to a roost

Provisional Specifications

ACT - Low Profile Design

Model Length (mm) Width (mm) Height (mm) Weight (g) *
ACT-521 21 7.5 6.5 1.2
ACT-626 22 7.5 7.0 1.5

ACT - Compact Design

Model Length (mm) Width (mm) Height (mm) Weight (g) *
ACT-521 16 8.5 7.5 1.1
ACT-626 16 8.5 7.5 1.3
ACT-393 17 9.0 10 3.1

* Weight estimate based on 18 cm ‘fine’ antenna and lightweight coating for all models.
For 22 cm 'heavy duty' antenna, add 0.4g weight and 2mm length. Harness tubes will also add weight and length.
Please contact your Avian Telemetry Specialist for more details.

Estimated Lifespan in days

Model (both designs) Burst Interval (s)
4 7 10 13
ACT-521 50 80 100 120
ACT-626 100 160 200 240
ACT-393 260 410 540 640

Notes on Estimated Lifespan
The burst intervals and corresponding estimated life specified for the transmitters are provided for comparative purposes.
Various burst rates are available, based upon application specific considerations and operational life requirements.
Warranty is 80% of the estimated lifespan, effective from date of shipment.

ACT Avian Coded Tags product sheet (PDF)