Open Wide, Diamondback!

Among the delights of living in the southwest borderlands is the opportunity to watch interesting reptiles going about their lives. Western Diamondbacks are the most frequent rattlesnakes to visit our yard –– sometimes to drink, sometimes to battle each other for dominance, sometimes to mate, and often to ambush prey. They are nonaggressive towards us, but we do have to fine-tune our snake radar during the warmer months! Awareness of where we walk or reach quickly becomes second nature.

A Western Diamondback Rattlesnake, Crotalus atrox, has captured 

an adult Gambel's Quail (All photos by Narca)

Yesterday a medium-sized Diamondback (about 4 1/2 feet long) caught an unwary male Gambel's Quail. We have a big surplus of unmated male Gambel's in the neighborhood, right now all of them giving their plaintive come-hither calls, in the effort to find a mate. Any step outside immerses us in a quailey surround-sound. So this Diamondback found a meal in an abundant species; and we were glad he hadn't caught one of our much scarcer Scaled or Montezuma quail. Diamondbacks often eat rodents, like woodrats, and even full-grown cottontails. Western Diamondbacks reputedly can go for two years without food in the wild!

Are you sure you can manage that??

A snake in the neighborhood gets noticed. In fact, one can stay coiled for days near water or seed, before a strike is finally successful. We've seen many more misses than strikes. When a snake does catch inattentive prey, the long process of swallowing attracts spectators –– here, a Canyon Towhee, among the most curious of birds.

Western Diamondback, watched by a Canyon Towhee 

(and by me, from our balcony!)

Bit by bit, the quail disappears

Black-tailed Rattlesnakes also wander through the yard, but they are more active hunters, and don't set up shop by the water dishes. Mojave Rattlesnakes are much more frequent down in the valley below us, at a slightly lower elevation.

For years, a very large rattlesnake, which we dubbed "Old Scarsides", visited us, but he disappeared several years ago. 

Nearly gone...

The most memorable email I ever received from a house-sitter reached us in Bolivia, from Dave Utterback, the noted bird artist who died in 2009. While house-sitting, he had left our front door open, and a woodrat got in. He managed to trap the woodrat, and put her in the freezer. Next day, a rattlesnake coiled in ambush by the seed feeder, and Dave tried to feed the woodrat to the snake, which showed no interest in the cold carcass. "So I warmed her up in your microwave, and then the snake ate her." Thanks, Dave.

If you're afraid of snakes, and would like to get past that, the next time you see one, just watch from a safe, respectful distance. Soon you may find yourself more intrigued than afraid! 

School for Thrashers

This morning a small Western Diamondback rattlesnake meandered into the yard. We knew a snake was nearby from the turmoil among the thrashers, cardinals, and Black-throated Sparrows. Nothing else stimulates such a flashing of wings and intense glaring.

A family of four Curve-billed Thrashers––both adults and their two fledglings––was especially emphatic. The adults seized the opportunity to teach their young a thing or two about the danger posed by snakes. Judging from the way the young joined the action, they are now well-schooled.

Curve-billed Thrasher protests a rattlesnake. (Photos by Narca)

A few minutes later a single Crissal Thrasher came in for a drink. This bird had no family in tow, but joined the general melée anyway!

A Crissal Thrasher joins the fracas.

Crissal Thrasher's best distinguishing marks––the chestnut undertail coverts and strong malar––aren't obvious here, but you can see the less-orange eye. To me they seem a little more slender and elegant than the Curve-billeds, with a slightly longer, slightly more curved black bill. With practice, you can learn to distinguish at a glance the subtle differences in proportions––but then confirm your impression by checking that malar mark and chestnut under the tail! Thrashers can pose identification challenges!

The business end of a Western Diamondback Rattlesnake, staked out and patiently waiting for a meal.