A New Mexico Ridgenosed Rattlesnake (Crotalus willardi obscurus). This federally protected rattlesnake ranges into Arizona, but only a dwindling population remains.

A Spotted Leafnosed Snake found late at night a couple of summers ago. While many snakes are tucked away in late May and June to wait for the monsoon, these snakes are very active. The reason: lizard eggs. These are reptile egg specialists, and June is a great time to be out looking for them […]

A beast of a Lyresnake! These are typically slender snakes, but this has been very successful. At first it looked like a gophersnake, with a chunky build and round face. These are cryptic snakes that few people that live in Arizona, even born here, will ever see.

A Western Diamondback Rattlesnake resting in partial shade. By making small adjustments to position throughout the day, a snake can precisely regulate its temperature. While they may be encountered out in full sun, this is how the majority of basking is done.

A California Kingsnake on the crawl late at night in central Arizona.

A Southwestern Speckled Rattlesnake rests in a rocky retreat, waiting for dark. Like other rattlesnake species in the Phoenix area, once temperatures stabilize in the triple digits, their activity becomes mostly nocturnal. The late afternoon is a good time to wait for a lizard or bird to make a mistake, in the meantime.

One of the Malabar Pitvipers we saw on night hikes in rainforests of Karnataka, India. Convergently, they were very similar in appearance and behavior to arboreal vipers I’ve seen in Central and South America.

A pair of Gila Monsters getting some of their first sun in the early spring, a couple of years ago. They had only recently made a short walk from an overwintering den, where they had buried themselves in dirt at the base of a boulder, to this staging area. Here, at least five individuals spend […]

The most common coralsnake I’ve seen in Peru is the Aquatic Coralsnake. They’re big, twitchy, and relatively common in the slopes along tributaries of the Amazon River.

A mated pair of Banded Rock Rattlesnakes, tucked into rocks in a minor drainage in southeastern Arizona. During the late monsoon season, it’s not uncommon to find pairs or rattlesnakes like this, courting and mating in one rock pile while others are still giving birth elsewhere. The period of seasonal rain is the peak of […]