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Coordination of colour and code is necessary, otherwise with the exponential booming of cr-projects colour-ring birding runs into a disaster.

Despite all efforts to coordinate colour-ringed species (colours and codes) some project leaders started their project illegaly. This could lead to ‘unknown projects’ and mystery sightings.

Under you can find a list of cr-mystery birds.

Feel free to contact the observer and let me know something is the mystery is solved.


Lesser Black-backed Gull : legrings : red ring/white code 20  and ring with a tel. number

White Stork : legring : black uncoded (on left tibia). or

Hen Harrier : wingtag : fuchsia with one white bar (on right wing).

Great Skua : legring : blue four alpha-numeric code.

Red Kite : wingtag : blue 83

Red Kite : wingtag : white E1

Stone Curlew : legrings : green/orange/orange left

Herring Gull : legring : blue taped ring

Meadow pipit : wingtag : maybe a small white wingtag