Van konijnen, kalk en blauwtjes

In the 1920s, the British naturalist R.W. Robbins described the disappearance of the Chalk Hill Blue and the Adonis Blue in a chalk pit in southern England. The cause was that rabbits, kept down in number during the First World War when they were shot for food, had multiplied and eaten all the Horseshoe vetch, the host plant of the two butterfly species.