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"The brown argus butterfly has expanded its range in England." Source of caption and photo: online version of the NYT article quoted and cited below.

(p. D3) A butterfly species in England is expanding its range, thanks to climate change.

In the current issue of Science, researchers at the University of York report that the brown argus butterfly has spread its reach in England northward by about 50 miles over 20 years as a warmer climate allows its caterpillars to feed off wild geranium plants, which are widespread in the countryside.

For the full story, see:

SINDYA N. BHANOO. "OBSERVATORY; A Butterfly Takes Wing on Climate Change." The New York Times (Tues., May 29, 2012): D3.

(Note: the online version of the article has the date May 24, 2012.)

The results summarized above are reported to the scientific community in:

Chen, Ching, Jane K. Hill, Ralf Ohlemüller, David B. Roy, and Chris D. Thomas. "Report; Rapid Range Shifts of Species Associated with High Levels of Climate Warming." Science 333, no. 6045 (August 19, 2011): 1024-1026.