Which of the big cats can leap 15 vertical feet? The snow leopard. What feline captures prey alive so that her cubs can practice hunting? The cheetah. What are the four different sounds that tigers make? Chuffle, woof, grunt and roar. . . . "The Audubon Society Book of Wild Cats," by Les Line and Edward R.Ricciuti (Abrams Art Books, 1985, $50), offers a look at how 35 species hunt, mate and rear their young, in 160 color photographs and in an often surprising text.