Warblers

Combination of 3 c-rings : 
* 2 c-rings (on one leg)
* metal ring above or below c-ring (on the other leg).

note 1 : birds ringed in the UK, southern England.

note 2 : used colours are : dark-blue (mid-blue), red, white, yellow, black, dark-green (mid-green), light-blue, dark-pink, grey, brown, orange, violet.

note 3 : study of wintering Blackcap in Britain and Ireland : movements and behaviour.

note 4 :