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A Brazilian lancehead (Bothrops moojeni) at the Gladys Porter Zoo in Brownsville, Texas.

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A Brazilian lancehead (Bothrops moojeni) at the Gladys Porter Zoo in Brownsville, Texas.

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A Russell’s viper (Daboia russelli) at the Gladys Porter Zoo in Brownsville, Texas.

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A Russell’s viper (Daboia russelli) at the Gladys Porter Zoo in Brownsville, Texas.

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A desert massasauga (Sistrurus catenatus edwardsii) at the Gladys Porter Zoo in Brownsville, Texas.

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A Mexican ratsnake (Elaphe flavirufa flavirufa) at the Gladys Porter Zoo in Brownsville, Texas.

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A Northwestern neotropical rattlesnake (Crotalus durissus culminatus) at the Gladys Porter Zoo in Brownsville, Texas. This is a xanthic specimen, lacking normal pigmentation.

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A Northwestern neotropical rattlesnake (Crotalus durissus culminatus) at the Gladys Porter Zoo in Brownsville, Texas. This is a xanthic specimen, lacking normal pigmentation.

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A Northwestern neotropical rattlesnake (Crotalus durissus culminatus) at the Gladys Porter Zoo in Brownsville, Texas. This is a xanthic specimen, lacking normal pigmentation.

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A Central American bushmaster (Lachesis stenophrys) at the Gladys Porter Zoo in Brownsville, Texas.

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A Central American bushmaster (Lachesis stenophrys) at the Gladys Porter Zoo in Brownsville, Texas.

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A Mexican ratsnake (Elaphe flavirufa flavirufa) at the Gladys Porter Zoo in Brownsville, Texas.

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An endangered (IUCN) and federally endangered female Galapagos tortoise (Chelonoidis vicina) at the Gladys Porter Zoo in Brownsville, Texas.

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The tail of a blue spotted tree monitor (Varanus macraei) at the Gladys Porter Zoo in Brownsville, Texas.

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A blue spotted tree monitor (Varanus macraei) at the Gladys Porter Zoo in Brownsville, Texas.

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A blue spotted tree monitor (Varanus macraei) at the Gladys Porter Zoo in Brownsville, Texas.

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A blue spotted tree monitor (Varanus macraei) at the Gladys Porter Zoo in Brownsville, Texas.

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An endangered (IUCN) and federally endangered male Jentink’s duiker (Cephalophus jentinki) named Taz at the Gladys Porter Zoo in Brownsville, Texas.

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An endangered (IUCN) and federally endangered male Jentink’s duiker (Cephalophus jentinki) named Taz at the Gladys Porter Zoo in Brownsville, Texas.

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A green conure (Aratinga holochlora) at the Gladys Porter Zoo in Brownsville, Texas.

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A green conure (Aratinga holochlora) at the Gladys Porter Zoo in Brownsville, Texas.

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A green conure (Aratinga holochlora) at the Gladys Porter Zoo in Brownsville, Texas.

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A green conure (Aratinga holochlora) at the Gladys Porter Zoo in Brownsville, Texas.

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A Texas giant centipede (Scolopendra heros castaneiceps) at the Gladys Porter Zoo in Brownsville, Texas.

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A banded flat rock scorpion (Hadogenes paucidens) at the Gladys Porter Zoo in Brownsville, Texas.

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A banded flatrock scorpion (Hadogenes paucidens) at the Gladys Porter Zoo in Brownsville, Texas.

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A bordered patch butterfly (Chlosyne lacinia) at the Gladys Porter Zoo in Brownsville, Texas.

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A bordered patch butterfly (Chlosyne lacinia) at the Gladys Porter Zoo in Brownsville, Texas.

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A Mexican bluewing butterfly (Myscelia ethusa ethusa) at the Gladys Porter Zoo in Brownsville, Texas.

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A Mexican bluewing butterfly (Myscelia ethusa ethusa) at the Gladys Porter Zoo in Brownsville, Texas.

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A Mexican bluewing butterfly (Myscelia ethusa ethusa) at the Gladys Porter Zoo in Brownsville, Texas.

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A great southern white butterfly (Ascia monuste) at the Gladys Porter Zoo in Brownsville, Texas.

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A great southern white butterfly (Ascia monuste) at the Gladys Porter Zoo in Brownsville, Texas.

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A gulf fritillary butterfly (Agraulis vanillae incarnata) at the Gladys Porter Zoo in Brownsville, Texas.

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A gulf fritillary butterfly (Agraulis vanillae incarnata) at the Gladys Porter Zoo in Brownsville, Texas.

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A malachite butterfly (Siproeta stelenes) at the Gladys Porter Zoo in Brownsville, Texas.

Photo: Julie Jensen Director of Marketing | WVC O: 866.800.7326 | D: 702.443.9249 | E: j.jensen@wvc.org

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