Birds, including the White Ibis, are another eco-tour attraction. (Erik Allard) By Jim Abbott, Orlando Sentinel Travel Everglades Natural Resources Tourism and Leisure Wetlands Pets National Parks WHAAP!It sounds like someone is cracking a bull-whip on the surface of the glassy water of a swimming pool.WHAAP!Hear that? asks Greg Allard, 60, the owner and tour guide of Southwest Florida EcoTours