 National Geographic Field Guide to the Birds of North America, Fifth Edition Author: Jon L. Dunn Manufacturer: National Geographic ListPrice: $24.00 Offer: $16.32
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 A Field Guide to Insects Manufacturer: Houghton Mifflin ListPrice: $19.00 Offer: $12.92
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 The Sibley Field Guide to Birds of Western North America Author: David Allen Sibley Manufacturer: Knopf ListPrice: $19.95 Offer: $13.57
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 Peterson Field Guide to Mammals of North America: Fourth Edition (Peterson Field Guides (R)) Author: Fiona Reid Manufacturer: Houghton Mifflin ListPrice: $20.00 Offer: $13.60
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 A Field Guide to Freshwater Fishes : North America North of Mexico (Peterson Field Guides) Author: Brooks M. Burr Manufacturer: Houghton Mifflin ListPrice: $19.00 Offer: $12.92
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 A Field Guide to Reptiles & Amphibians of Eastern & Central North America (Peterson Field Guide Series) Author: Roger Conant Manufacturer: Houghton Mifflin ListPrice: $21.00 Offer: $14.28
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 A Field Guide to Western Birds: A Completely New Guide to Field Marks of All Species Found in North America West of the 100th Meridian and North of Mexico Manufacturer: Houghton Mifflin ListPrice: $19.95 Offer: $11.37
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 A Field Guide to Pacific States Wildflowers: Washington, Oregon, California and adjacent areas (Peterson Field Guides (R)) Author: Theodore F. Niehaus Manufacturer: Houghton Mifflin ListPrice: $19.00 Offer: $12.92
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 The National Audubon Society Field Guide to North American Reptiles and Amphibians Author: NATIONAL AUDUBON SOCIETY Manufacturer: Knopf ListPrice: $19.95 Offer: $13.57
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 A Field Guide to Western Butterflies (Peterson Field Guides (R)) Author: Paul A. Opler Manufacturer: Houghton Mifflin ListPrice: $24.00 Offer: $16.32
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 A Field Guide to Western Trees (Peterson Field Guides: 44) Author: George A. Petrides Manufacturer: Houghton Mifflin ListPrice: $20.00 Offer: $13.60
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 A Field Guide to Western Birds: A Completely New Guide to Field Marks of All Species Found in North America West of the 100th Meridian and North of Mexico (Peterson Field Guides (R)) Manufacturer: Houghton Mifflin ListPrice: $27.00 Offer: $17.82
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 Peterson Field Guide to Animal Tracks: Third Edition (Peterson Field Guides (R)) Author: Olaus J. Murie Manufacturer: Houghton Mifflin ListPrice: $19.95 Offer: $13.57
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 Mammals of California (California Natural History Guides) Author: E. W. Jameson Jr. Manufacturer: University of California Press ListPrice: $19.95 Offer: $14.96
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 A Key to Amphibians & Reptiles of the Continental United States and Canada Author: Robert Powell Manufacturer: University Press of Kansas ListPrice: $17.95 Offer: $16.15
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 A Field Guide to Animal Tracks (Peterson Field Guides(R)) Author: Olaus J. Murie Manufacturer: Houghton Mifflin ListPrice: $19.00 Offer: $14.82
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 Herpetology (3rd Edition) Author: F. H. Pough Manufacturer: Benjamin Cummings ListPrice: $117.60 Offer: $94.08
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 Peterson Field Guide Color-In Book: Mammals (Peterson Field Guide Color-In Books) Author: Peter C. Alden Manufacturer: Houghton Mifflin ListPrice: $7.95 Offer: $7.95
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 A Field Guide to Mammals: North America north of Mexico (Peterson Field Guides(R)) Author: William H. Burt Manufacturer: Houghton Mifflin ListPrice: $19.00
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 Mammals of North America (Princeton Field Guides) Author: Roland W. Kays Manufacturer: Princeton University Press ListPrice: $19.95 Offer: $15.96
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 Peterson First Guide to Mammals of North America (Peterson First Guides (R)) Author: Peter C. Alden Manufacturer: Houghton Mifflin ListPrice: $5.95 Offer: $5.95
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 Rattlesnakes: Their Habits, Life Histories, and Influence on Mankind, Abridged edition Author: Laurence M. Klauber Manufacturer: University of California Press ListPrice: $24.95 Offer: $18.21
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 Mammals of North America (Princeton Field Guides) Author: Roland W. Kays ListPrice: $19.95
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