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 illegal their project. 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.
species. type / colour / code / position
Great Skua legring : blue four alpha-numeric code B128
Red Kite wingtag / blue / 83 / right
Red Kite wingtag / white / E1 / right
Stone Curlew legrings / green /orange / orange / left & right