By Jim Karpen on Mon, 12/07/2009
Green Mountain Digital began releasing the first in its series of Audubon field guides last month, including birds, wildflowers, trees, and mammals. You can see their offerings on this page in the App Store. The prices range from $6.99 to 19.99. If you think you might be interested in this offering, check out the free Audubon Sampler, which contains 40 examples from the 3,700 species found in these guides.