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Carl Koch: P1180011
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Carl Koch: Wagler's pit viper (Tropidolaemus wagleri), captive
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Carl Koch: Bald Eagle (Haliaeetus leucocephalus), Mississippi River, Iowa/Wisconsin border
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Carl Koch: Bald Eagle (Haliaeetus leucocephalus), juvenile, Mississippi River, Iowa/Wisconsin border
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Carl Koch: P2130266
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Carl Koch: P2190004
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Carl Koch: P2200138
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Carl Koch: P2200167
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Carl Koch: P2200193
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Carl Koch: P3220027
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Carl Koch: P3220032
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Carl Koch: P4050078
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Carl Koch: P4050084
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Carl Koch: P4080117
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Carl Koch: P4090226
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Carl Koch: A very pretty spotted salamander (Ambystoma maculatum) from Waukesha County
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Carl Koch: Blanding's turtle (Emydoidea blandingii), Waukesha County, Wisconsin
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Carl Koch: P4270030
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Carl Koch: P4270071
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Carl Koch: P4280071
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Carl Koch: P4280024
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Carl Koch: P4300004
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Carl Koch: P5220067
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Carl Koch: P5220075
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Carl Koch: P5280118
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Carl Koch: P5280189
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Carl Koch: P5300265
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Carl Koch: P6220077
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Carl Koch: Western hog-nosed snake (Heterodon nasicus), northwest Illinois
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Carl Koch: P6250141