Yes it looks the same... although if it were then I'd expect the scientific name to be the same for both countries, whatever the common label. There are a number of different Clouded Yellows in Europe (Berger's, Moorland and Pale) but our plain Clouded Yellow (Colias croceus) does seem to be identical to your Alfalfa Butterfly. Having said all that, there are further variations seen within Colias croceus... with some having large orange spots across the black areas, and others being a much lighter, striking lemon yellow colour
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