Joel Sartore / Photo Ark / Dickerson's collared lizard (Crotaphytus dickersonae) with mouth open, portrait, Omaha Henry Doorly Zoo and Aquarium. Captive, occurs in Mexico.
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Joel Sartore / Photo Ark / Dickerson's collared lizard (Crotaphytus dickersonae) with mouth open, portrait, Omaha Henry Doorly Zoo and Aquarium. Captive, occurs in Mexico.
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Joel Sartore / Photo Ark / Dickerson's collared lizard (Crotaphytus dickersonae) with mouth open, head portrait, Omaha Henry Doorly Zoo and Aquarium. Captive, occurs in Mexico.
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Joel Sartore / Photo Ark / Chihuahua collared lizard (Crotaphytus collaris melanomaculatus) male, portrait, Omaha Henry Doorly Zoo and Aquarium. Captive.
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Joel Sartore / Photo Ark / Chihuahua collared lizard (Crotaphytus collaris melanomaculatus) male, head portrait, Omaha Henry Doorly Zoo and Aquarium. Captive.
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Joel Sartore / Photo Ark / Chihuahua collared lizard (Crotaphytus collaris melanomaculatus) male, portrait, Omaha Henry Doorly Zoo and Aquarium. Captive.
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Joel Sartore / Photo Ark / Chihuahua collared lizard (Crotaphytus collaris melanomaculatus) male, head portrait, Omaha Henry Doorly Zoo and Aquarium. Captive.
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Joel Sartore / Photo Ark / Chihuahua collared lizard (Crotaphytus collaris melanomaculatus) male, head portrait, Omaha Henry Doorly Zoo and Aquarium. Captive.
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Joel Sartore / Photo Ark / Chihuahua collared lizard (Crotaphytus collaris melanomaculatus) male, portrait, Omaha Henry Doorly Zoo and Aquarium. Captive.
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Joel Sartore / Photo Ark / Pair of Chihuahua collared lizards (Crotaphytus collaris melanomaculatus), male on left, portrait, Omaha Henry Doorly Zoo and Aquarium. Captive.
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Joel Sartore / Photo Ark / Chihuahua collared lizard (Crotaphytus collaris melanomaculatus) female, portrait, Omaha Henry Doorly Zoo and Aquarium. Captive.
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Joel Sartore / Photo Ark / Dickerson's collared lizard (Crotaphytus dickersonae) portrait, Omaha Henry Doorly Zoo and Aquarium. Captive, occurs in Mexico.
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Jeff Foott / Common collared lizard (Crotaphytus collaris auriceps) male basking on rock. Arches National Park, Utah, USA. May.
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Jeff Foott / Common collared lizard (Crotaphytus collaris auriceps) male basking on rock. Arches National Park, Utah, USA. May.
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Jeff Foott / Common collared lizard (Crotaphytus collaris auriceps) male basking on rock. Arches National Park, Utah, USA. May.
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Jeff Foott / Common collared lizard (Crotaphytus collaris auriceps) male basking on rock. Arches National Park, Utah, USA. May.
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Jeff Foott / Common collared lizard (Crotaphytus collaris auriceps) male basking on rock. Arches National Park, Utah, USA. May.
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Jeff Foott / Common collared lizard (Crotaphytus collaris auriceps) male basking on rock. Arches National Park, Utah, USA. May.
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Jeff Foott / Common collared lizard (Crotaphytus collaris auriceps) male basking on rock. Arches National Park, Utah, USA. May.
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Frederique Olivier / Yellow-headed collared lizard (Crotaphytus collaris auriceps) basking on a rock, Castle Valley, Utah, USA.
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Frederique Olivier / Tracking shot of a Yellow-headed collared lizard (Crotaphytus collaris auriceps) moving on a rock, Castle Valley, Utah, USA.
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Frederique Olivier / Yellow-headed collared lizard (Crotaphytus collaris auriceps) in shade on a rock, jumps away, Castle Valley, Utah, USA, 2018.
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Frederique Olivier / Yellow-headed collared lizard (Crotaphytus collaris auriceps) basking on a rock, Castle Valley, Utah, USA, 2018.
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Frederique Olivier / Yellow-headed collared lizard (Crotaphytus collaris auriceps) basking on a rock, looking around, Castle Valley, Utah, USA, 2018.
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Frederique Olivier / Yellow-headed collared lizard (Crotaphytus collaris auriceps) entering a hole, Castle Valley, Utah, USA, 2018.
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Frederique Olivier / Yellow-headed collared lizard (Crotaphytus collaris auriceps) emerging from a hole, Castle Valley, Utah, USA, 2018.
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Frederique Olivier / Yellow-headed collared lizard (Crotaphytus collaris auriceps) pausing outside a crevice in a rock before entering, Castle Valley, Utah, USA, 2018.
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Frederique Olivier / Yellow-headed collared lizard (Crotaphytus collaris auriceps) climbing on a rock, basking, Castle Valley, Utah, USA, 2018.