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| | Nat'l Academies Press, Science and the Endangered Species Act (1995), Chapter 2. Species Extinction |
 | | Intertribal trading of bircis and mammals might account for some of these distributions, although many, if not most, reflect formerly indigenous populations, including species such as the trumpeter swan, Mississippi kite, swallow-tailed kite, whooping crane, sanc~hill crane, long-billed curlew, Carolina parakeet, ivory-billed woodpecker, common raven, fish crow, rice rat, Allegheny woodrat, fisher, and puma. |
 | | Prehistoric hunting, trapping, habitat modification, and climate-ciriven habitat changes might have been involved in some of the contractions of species' ranges. |
 | | Many of these sites bear evidence of species well outside their known post-Columbian range (Semken, 1983; Pielou, 1991~. |
| www.nap.edu /books/0309052912/html/19.html |
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