[BACK TO LIST] CLOUDED YELLOW Colias croceus
A migrant species which does not survive the British winter in any stage, and therefore unpredictable as to where it may be found in any year.
THE THREE PERIODS COMPARED
PERIOD 1 (1940-1994) WITH RECORDING COVERAGE, ALTITUDE AND URBAN COVER
PERIOD 2 (1995-2000) WITH RECORDING COVERAGE, ALTITUDE AND URBAN COVER
PERIOD 3 (2001-2007) WITH RECORDING COVERAGE, ALTITUDE AND URBAN COVER
