A Gila Monster I followed to a nest of cottontails. It took a while, but it ate all three of them that were in there. Amazingly, they all fit, and the lizard ambled off to rest under an overhanging root in the drainage. It was a good example of how the venom of Gila Monsters is not necessary for predation, as the venom played no apparent role in the capture or consumption of its prey.
A small Banded Rock Rattlesnake in ambush along the base of a boulder in southeastern Arizona. The pattern and bands break up its shape, making it difficult to see in context. This is a good way to catch one of the many Yarrows Spiny Lizards jumping around on the same rocks each morning.
To another small snake, this is a terrifying sight. A venomous snake-eating specialist that will take prey almost as large as it is by clamping down tight and flipping over, using its atypically long body as an anchor. After releasing, it follows the mortally wounded snake, face to face, watching it until it either dies or needs another round of venom.
But to humans – totally harmless, not that it would bite anyway.
We found this Regal Ring-necked Snake crossing a roadway after dark in southeastern Arizona. Most that I’ve seen are in the day time … in fact, this is the only one I can find in my memory or notes that I’ve found at night. In this photo, it’s showing its characteristic defensive display, with a brightly colored underbelly and twisted tail.
Crossing a metal bridge on a trail through the Costa Rican rainforest, we were stopped by the sight of a Blunt-headed Tree Snake in the latter stages of eating a small lizard. The lizard was still trying to escape, but the snake was not going to lose this one. These tree snakes, with their huge eyes and comically thin bodies, seem kind of goofy, so it was cool to see one doing what they do, and know that for as silly as they seem to be, to a sleeping anole it is a pretty terrifying animal.
Southwestern Speckled Rattlesnake resting under a bush on a cool Spring day. With temperatures still in the low 50s at night, this snake sat out overnight waiting for prey to wander by, nearly a quarter mile from its den further up the bajada.
Arizona Black Rattlesnake lying in ambush nearly vertically against a boulder near an isolated water hole on a hot summer night.
An Arizona Black Rattlesnake in ambush in the first sun of the day. The flat rock is on the only, narrow path to a natural water hole – the only water in the region. Any small mammal wanting to visit it would have to jump across this rock. This is likely something this snake knows very well by now, an example of how much can go into the selection of a hunting position. If I may anthropomorphize a bit, I’d call it strategic.
Arizona Black Rattlesnake as seen from above. This snake was found in ambush on a narrow channel leading to a rare water hole – animals must walk this path to drink, making for a great hunting spot.
A large Tiger Rattlesnake in a loose ambush coil near a series of rodent nests. This one was found just after sunup in a heavily urbanized area. Not all hunting postures for rattlesnakes are simple coils. Rattlesnakes may actively track, then settle in for a relatively short period, then move and set up again. I don’t know if this one succeeded, but it was gone when I passed through the area an hour later.
A Southwestern Speckled Rattlesnake waiting for an unlucky animal to come along in Phoenix. These locations are carefully selected, often after tracking a scent trail for some distance to find an ideal ambush situation.
