California Rattlesnakes by Don Becker (iOS & Android App) George Mayfield Apps, Herp App, Reptiles & Amphibians, Reptiles & Amphibians: North America July 8, 2016
IL: American Birding Association Field Guide to Birds of Illinois George Mayfield Illinois December 6, 2016
The Birds of Panama: A Field Guide (Zona Tropical Publications) George Mayfield Mexico & Central America, Panama March 3, 2016
Waterfowl of North America, Europe, and Asia: An Identification Guide George Mayfield Birds, Waterfowl April 5, 2016
Dragonflies and Damselflies of Texas and the South-Central United States: Texas, Louisiana, Arkansas, Oklahoma, and New Mexico George Mayfield Dragonflies & Damselflies: North America, Insects April 7, 2016
Audubon Bird Guide: North America (iOS & Android) George Mayfield Apps, Birding App February 10, 2017
BirdsEye – Global Bird Finding Guide (iOS & Android App) George Mayfield Apps, Birding App March 23, 2016
AZ: American Birding Association Field Guide to Birds of AZ: Arizona (American Birding Association State Field) George Mayfield Arizona December 6, 2000
PA: American Birding Association Field Guide to Birds of Pennsylvania (American Birding Association State Field) George Mayfield Pennsylvania December 6, 2016
Dragonflies and Damselflies of the West (Princeton Field Guides) George Mayfield Dragonflies & Damselflies: North America, Insects April 7, 2016
Stokes Beginner’s Guide to Dragonflies George Mayfield Dragonflies & Damselflies: North America, Insects April 7, 2016
Birds of Australia: Eighth Edition (Princeton Field Guides) George Mayfield Australia, Australia, New Zealand, South Pacific March 30, 2016