| References |
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Cornell Lab of Ornithology |
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Field Guide to the Birds of North America, 4th Edition |
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by The National Geographic Society, Copyright © 2002 |
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Field Guide to North American Birds, Eastern Region |
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by The Audubon Society, Copyright © 1977, Eight Printing |
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Field Guide to North American Birds, Western Region |
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by The Audubon Society, Copyright © 1977, Tenth Printing |
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Field Guide to North American Fishes, Whales & Dolphins |
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by The Audubon Society, First Printing |
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Field Guide to North American Insects & Spiders |
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by The Audubon Society, Copyright © 1980, Second Printing |
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Field Guide to North American Mammals |
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by The Audubon Society, Copyright © 1996, Second Edition |
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Field Guide to North American Reptiles & Amphibians |
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by The Audubon Society, Copyright © 1979, Second Printing |
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Guide to Common Freshwater Invertebrates of North America |
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by J. Reese Voshell, Jr., Copyright © 2002, Third Printing |
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Hawks of North America |
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by Peterson Field Guides, Copyright © 2001, Second Edition |
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Mammals of Texas |
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by Texas Parks and Wildlife Copyright © 1994 |
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National Weather Service Southern Region Headquarters |
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North Central Texas Council of Governments |
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Texas Wildlife Viewing Guide |
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by Gary L. Graham, Copyright © 1992 |
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Tree of Life Web Project |
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University of Michigan Museum of Zoology Animal Diversity Web |
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US Geological Survey |
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