The New York Telephone Company announced it had prepared for April Fools Day, as it had done so for the past thirty years, by assigning special operators to intercept all calls to the Bronx Zoo. Only legitimate calls would be allowed through. When the day came, it intercepted 2561 calls to the zoo from people seeking to speak with Mr. Lion, Mr. Fox, Mr. Wolf, Mr. Beaver, etc. This was only half the number of calls made the previous year. [Chicago Daily Tribune, Apr 2, 1960.]