prairie of the upper Midwest and the eastern aspen parklands of Canada (Allen 1952). It also nested in such disparate regions as the taiga and sub-Arctic regions of the Northwest Territories, where the last remaining population has persisted to present times, and in the coastal marshes of Louisiana (Figure 5-1), where a nonmigratory population bred until 1939 and was extirpated from the wild in 1950 (Gomez 1992; Lewis 1995). Wetland ecosystems historically used by wintering whooping cranes were diverse as

FIGURE 5-1 Historical distribution of whooping cranes in North America. Source: Allen 1952. Reprinted with permission; copyright 1952, National Audubon Society.



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