Was it a migration - the exceptional abundance of the large white butterfly Pieris brassicae (L.) in 1992.
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| Abstract | Pieris brassicae was very abundant in the UK in 1992. The timing of systematic counts, anecdotal reports of exceptional local abundance and frequent counts at a coastal site, cast doubt on the importance of immigration in contributing to the large populations. Emergence within the UK is suggested. | 
| Year of Publication | 1994 | 
| Journal | Entomologist | 
| Volume | 113 | 
| Issue | 4 | 
| Number of Pages | 211-216 | 
| Date Published | 1994 | 
| Short Title | Entomologist | 
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