What Bird is That?
by Frank M. Chapman
Publisher: D. Appleton & co 1920
Number of pages: 145
A pocket museum of the land birds of the eastern United States arranged according to season. The birds are drawn and reproduced with such accuracy that no essential detail of color or form is lost. They are all drawn to nearly the same scale.
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by Roger Jacob Cantor - Crater Lake Natural History Association
Oregon Caves National Monument and Preserve is a protected area in the northern Siskiyou Mountains of southwestern Oregon in the United States. The 4,554-acre park, including the marble cave, is 20 miles east of Cave Junction, on Oregon Route 46.
- National Park Service
Devils Tower National Monument is in the Black Hills of northeastern Wyoming. The handbook gives a brief introduction to the park and its history and takes a close look at the area's natural history and, in particular, prairie dogs.
by Henry David Thoreau - Project Gutenberg
In 1845, Henry David Thoreau moved into a cabin by Walden Pond. With the intention of immersing himself in nature and distancing himself from the distractions of social life, Thoreau sustained his retreat for just over two years...
by David Villanueva - Smashwords
With over 40 years experience, Villanueva tackles the major problems metal detectorists face. Obtaining search permission; research and finding sites; laws and code of practice; choosing a metal detector and overcoming detector limitations; etc.