Documenting and Reporting an Observed Banded Bird
How to record color bands, leg flags and metal band numbers accurately, and how to choose the right reporting route for a banded bird.
Contents
The short answer
When you see a banded bird, record the complete marker arrangement before trying to interpret it. That means every band and flag, which of the bird's own legs each one is on, the order and position of the markers, their colors, and any visible characters. Then report it through the route that matches the marker. In the United States, federal metal bands and auxiliary markers such as color bands and leg flags are reported to the USGS Bird Banding Laboratory through its online band-reporting form. Bands from other countries, racing pigeons, falconry birds, state or other agency programs, and captive birds often belong to different issuers.
This applies whether you are scanning shorebirds at Medicine Lake or watching a hawk on a fence post anywhere on the Montana prairie. The marker scheme determines where the report goes. Where you saw the bird does not.
Why there is no universal color-code chart
Many people search for a list of bird band color codes, but color by itself does not identify a project or an individual bird. According to the USGS, color-marking schemes may be coordinated internationally or run locally by a single project. The same color can mean different things in different schemes. The Raptor Resource Project has also noted that band colors can vary by year and by region within one program.
Identification depends on the whole combination. The USGS explains that the exact placement of each colored band, the colors themselves, and the location of the metal band all matter. A report that says only "green band" usually cannot be traced. A report that gives the bird's left leg, green above white, the metal band on the right, and a readable code is far more useful.
Telling the marker types apart
- Federal metal band: an aluminum-colored band with a number. The US reporting form accepts federal band numbers of 8 or 9 digits.
- Color band: a plain colored ring. Its meaning comes from its color, its position and the other markers on the bird.
- Leg flag: a colored band with a tab that projects from the leg. A flag may carry an individual code made of letters or numbers.
- Other auxiliary markers: the reporting form records the marker type, its color, any code, the color of that code, and the side of the bird it is on.
What to record in the field
Write your notes or take photographs before the bird moves off. Always describe left and right from the bird's perspective, not yours. A bird facing you has its left leg on your right. If you cannot tell which way the bird was facing, mark the side as unresolved instead of guessing.
BANDED BIRD WORKSHEET
Date and time:
Location (as precise as possible):
Bird description / species (or "unknown"):
How the bird was encountered (seen alive, photographed, found dead, etc.):
Condition of bird and band:
BIRD'S LEFT LEG
Markers, top to bottom:
Above or below the leg joint:
Flag? (shape / tab direction):
Marker color(s):
Code characters and code color:
BIRD'S RIGHT LEG
Markers, top to bottom:
Above or below the leg joint:
Flag? (shape / tab direction):
Marker color(s):
Code characters and code color:
Metal band number (digits read):
Uncertain characters:
Orientation unresolved? (yes/no):
Photo filenames:The Raptor Resource Project's account of reading bands follows the same principle. A useful record includes the encounter date and location, the band type, which leg it is on, the colors and the code.
Recording uncertainty honestly
Do not fill in a digit or letter you could not actually read. The US reporting form accepts uncertain digits and unknown species, so a partial but honest record is more valuable than a complete guess. Here is an illustrative example of a transcription:
Bird's left: blue above white
Bird's right: metal band
Flag code appears to read: A?7 (second character unreadable)Keep the original photographs unedited alongside your notes. If you or someone else later works out which project the bird belongs to, record that conclusion separately so the original observation stays unchanged.
Choosing the reporting route
| Marker | Where to report |
| US federal metal band (8 or 9 digits), with or without color markers | USGS Bird Banding Laboratory online band-reporting form |
| Color bands or leg flags alone, no metal band visible | Same USGS form, using its color-marker option |
| Band from another country | The issuing country's banding office when possible; otherwise the USGS color-marker route, describing the scheme and any inscription on the band |
| Canadian federal band | The North American program is run jointly by Canada's Bird Banding Office and the US Bird Banding Laboratory; Canada also offers online reporting |
| Racing pigeon band | The organization that issued the band |
| Falconry band | The state or provincial office that issues falconry permits |
| State or other agency band | The agency named on the band |
| Captive or privately issued band | Usually a separate route, unless the bird also carries a federal band |
The North American banding program is a coordinated system, not a worldwide registry of every marker. Read any inscription on the band itself, because it often names the issuer.
Filing the US report
- 1. Choose the option that matches what you saw: a federal metal band, a federal band with color markers, or color markers only.
- 2. Enter how you encountered the bird and the condition of the bird and the band.
- 3. Enter the encounter date and location.
- 4. For each auxiliary marker, give its type, color, code, code color and side.
- 5. Enter the band number exactly as read, marking any uncertain digits.
- 6. Add your contact details.
- 7. Review every entry and correct any mistakes before selecting Send to BBL.
- 8. Upload your photographs when the form offers it after submission.
- 9. File a separate report for each banded bird, even if several were in the same flock.
There is no need to search for a separate free band-number lookup first. Submitting the report through the official form is the supported way to connect a band number or marker combination with its banding record. If the form does not work, the Bird Banding Laboratory accepts reports of problems through the contact listed on its report-a-band page.
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