No coal mine ever had such fiercesome canaries as David Gessner's beloved Ospreys -- the nearly eagle-sized fish hawks making a triumphant comeback around Cape Cod. Gessner makes the reader truly exult in nature as he walks, skinnydips and kayaks through the marshes, backwaters and beaches of Cape Cod observing Ospreys as their numbers recover from near obliteration by the chemical DDT. Only a few writers since Henry David Thoreau have had the depth of writing skill in this genre to share successfully their respectful observations while they take lessons from the natural world. As Gessner learns to observe, he mentors us by his example, and we, in turn, also learn to observe -- even as we are fascinated. Just as an excellent wine writer passes on the tricks and traditions of savoring a fine vintage, then makes us want to rush out and buy a bottle, Gessner teaches us how to "taste" nature, derive meaning from it, and makes us want to take a very long walk in a wild place. He holds these messages together using the Osprey as glue by linking its fate to Humankind's destiny. The regal raptor becomes a hopeful metaphor for civilization, if we will only take a clue from our mistakes and build upon remedies. He also takes the reader on a personal journey, illustrating how one may learn to understand and improve one's self, accept our shortcomings and peculiarities, and those of the people around us. One of the most appealing qualities of his writing morality is the manner in which Gessner introduces the reader to so many other nature writers, environmentalists and colorful local characters. His message makes us want to know more, read more, do more, and he gently provides a roadmap for that journey with a cleverly interwoven book list. He may also be the first nature writer to praise bug bites as a reminder that they are a sure sign you are out where you want to be.