Cr-mysteries

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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.

Most posting are by Facebook : https://www.facebook.com/groups/cr.birding/