Additional Marker Authorizations

Science Center Objects

Banders should plan ahead for the next season's field work, and request permission to use auxiliary markers well in advance of their need to mark birds. Allow at least 8 weeks for the Bird Banding Laboratory (BBL) to process your request. There may be additional time required for the bander to coordinate with other banders marking the same species. Coordination is the responsibility of the banders.

Please make a separate request for each marker type and species, unless you have a group of species using the exact same marker type.

U.S. banders who wish to use auxiliary markers should send a request to

Canadian banders should send requests to Louise Laurin at

All auxiliary marking requests should include:

  • Permit number
  • Species or subspecies (see codes)
  • Estimated number to be marked
  • Type of marker
  • Geographic location of project (count(ies), state or province)
  • Date study will begin and probable duration
  • A project proposal explaining the needs and goals
  • A brief summary of the bander's experience with the markers.

If you need to use colored markers:

If you need to use transmitters or other electronic devices:

  • Frequency range and attachment type for radio transmitters
  • Attachment type for satellite transmitters, GPS, GSM, data loggers, RFID
  • A statement of the body weight percentage for transmitters, data loggers, etc.

Note: All bands, auxiliary markers and attachment materials should not exceed 2% body weight for leg attachments and should not exceed 3% body weight for all other attachment styles.

Please allow 2 months lead time to process your request.

This information can be emailed to



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