home *** CD-ROM | disk | FTP | other *** search
/ Treasures of the America…Museum of Natural History / Treasures of the American Museum of Natural History.iso / pc / treasure / tr39 / t39pg04.pic (.png) < prev    next >
Macintosh Picture Format  |  1996-09-10  |  190.3 KB  |  640x310  |  8-bit (215 colors)
   ocr: Diorama the peregrine falcon and other birds, including the bald eagle, the osprey, and the brown pelican. These residues became highly concentrated in the birds' tissues and interfered with their calcium metabolism. As a result, their egg shells were sO thin that incubating adults crushed them. By 1964, not even one breeding pair of peregrine falcons remained east of the Mississippi River. In the past two decades, however, the peregrine falcon and other affected birds have been making a slow recovery, thanks to the 1972 ban on DDT in the United States, as well as to 45