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Macintosh Picture Format  |  1996-09-10  |  195KB  |  640x310  |  8-bit (215 colors)
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OCR: orama the peregrine falcon aad 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. result, their egg shells were thin that incubating adults crushed them. By 1964 not even one breeding pair of peregrine falcons remained east of Mississippi River In the past two decades however the peregrine falcon and other affected birds have been making slow recovery, thanks to the 1972 ban on DDT in the United States as well as te iorama