Event:
Millions of birds fly over western SF, darkens sky
More Notable Events on January 31:
1992 Sportscaster Howard Cosell retires
1991 Nugget's Michael Adams becomes shortest NBA player to get a triple-double
1982 10 Arabian oryx, extinct except in zoos, released in Oman
1982 U.S. Male Figure Skating championship won by Scott Hamilton
1851 Gail Borden announces invention of evaporated milk
