Book excerpt: Whether this is your first trip to the Big Thicket or your five hundredth, this handy guide will lead you down paths and waterways that are a nature lover's dream. America's first designated national preserve, the Big Thicket in Southeast Texas harbors at least a thousand species of flowering plants, two hundred species of birds, fifty kinds of reptiles, twenty species of mammals, two hundred species of wild trees and shrubs, and even four kinds of carnivorous (meat-eating) plants. The ten different ecosystems that support this unique diversity range from arid sandylands to cypress sloughs, from lordly upland forests to mud-crusted flats dappled by palmetto fronds. Small wonder, as popular nature writer Howard Peacock tells us, that the region has been called the "Biological Crossroads of North America" or even, as conservation efforts have focused on it, "America's Ark." Nature Lover's Guide to the Big Thicket offers tips on identifying plants and animals residing in the area, suggestions on trails to follow, and descriptions of sights to see and recreational opportunities to enjoy. It provides photographs to help plan your visit and checklists to record it. It's a book for the hip pocket, the car seat, the table by a reading chair. Let it lead you now in a leisurely tour--or many such tours--of this special 95,000-acre spot of earth.