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pro vyhledávání: '"Robert Littiken"'
Autor:
Fiona Becker, Derek Luchik, Robert Littiken, Ted Anchor, John A. Shuey, Alyssa Nyberg, Ellen Jacquart, Stuart Orr
Publikováno v:
Journal of Insect Conservation. 20:773-780
The butterfly Speyeria idalia was once a widespread species in the midwestern United States, but declined precipitously during the 1980s. By the early 1990s in NW Indiana and adjacent NE Illinois, it was reduced to a single site where it persisted as