Answers are grounded in this paper and cite their sources.
As with birds, the populations of some British butterflies and moths have undergone recent dramatic changes. The author suggests that a number of these seem likely to be in response to climatic vagaries.
No takes yet. Share an insight, caveat, or question.
John F. Burton Jr. (1975) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: