John Chan / Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate...
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Daniel Heuclin / Researcher from Indio Mountain Research Station capturing Eastern black-tailed rattlesnake (Crotalus ornatus) Chihuahuan Desert,Texas, USA. May 2019.
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Daniel Heuclin / Black-tailed rattlesnake (Crotalus molossus). Chiricahua mountains, Arizona, USA. June.
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John Chan / Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate...
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Daniel Heuclin / Desert massasauga snake (Sistrurus catenatus edwarsii) in desert, West Texas, USA, September.
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Daniel Heuclin / Black-tailed rattlesnake (Crotalus molossus) tasting the air, Arizona, USA, September. Controlled conditions
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Daniel Heuclin / Black-tailed rattlesnake (Crotalus molossus) with flies on head, Arizona, USA, September. Controlled conditions.
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Daniel Heuclin / Black-tailed rattlesnake (Crotalus molossus) tasting the air, Arizona, USA, September. Controlled conditions.
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Daniel Heuclin / Arizona black rattlesnake (Crotalus cerberus) tasting air and rattling tail, Arizona, USA, September. Controlled conditions.
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Daniel Heuclin / Arizona black rattlesnake (Crotalus cerberus) tasting air and rattling tail, Arizona, USA, September. Controlled conditions.
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Daniel Heuclin / Arizona black rattlesnake (Crotalus cerberus) rattling tail, Arizona, USA, September. Controlled conditions.
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Pete Oxford / Timber rattlesnake (Crotalus horridus) portrait showing heat-sensitive pit, Northern Georgia, USA, August. Captive, occurs in USA.
