Banded Rock Rattlesnake

Banded Rock Rattlesnakes are common in the hills and mountains of southeastern Arizona. They come in a variety of colors, often a combination of grey, blue, green, and pink, like this one. They’re quick to flee, and it would be hard to see a situation where a hiker or the relatively few people who live where they do could consider them something to fear. We found this one more than a decade ago, and it very well may be still cruising around in that same spot each year.

Mojave Rattlesnake from Central Arizona

A Mojave Rattlesnake from one of the higher-elevation populations in central Arizona. These snakes are common in grasslands, where they live in relatively flat, sandy areas. This one is from a canyon bottom it shares with several other species of rattlesnakes, including Western Diamondback Rattlesnakes, Arizona Black Rattlesnakes, Blacktailed Rattlesnakes, and Speckled Rattlesnakes.

Caspian Cobra in Uzbekistan

We met this Caspian Cobra in the grassy hills of eastern Uzbekistan.

This cobra may have the most lethal venom of all cobras … but its venom also shows potential to be an effective treatment for some cancers.

Ebrahim K, Vatanpour H, Zare A, Shirazi FH, Nakhjavani M. Anticancer Activity a of Caspian Cobra (Naja naja oxiana) snake Venom in Human Cancer Cell Lines Via Induction of Apoptosis. Iran J Pharm Res. 2016 Winter;15(Suppl):101-112. PMID: 28228809; PMCID: PMC5242357.

Speckled Rattlesnake Aestivation

A Southwestern Speckled Rattlesnake (Crotalus pyrrhus) resting in a small cave during the hottest time of the year. This location receives almost no sun, due to its depth and aspect, which makes it an ideal aestivation site.

Snakes, as do other ectothermic (cold-blooded) animals, do regulate their body temperature by managing external forces. It’s more than just basking in the sun … they also spend a lot of time and energy trying to stay cool. For animals in Arizona, that can be a challenge. These sites, where they return each year when temperatures become lethal, are just as important as a winter hibernation den for rattlesnakes in cooler areas.