Neil Balchan is upset, and so am I. The garter snake researcher visited a wintering den where he was doing field research only to discover that dozens of harmless red-sided garter snakes had been beaten and butchered at the site. CBC News has more.
Here’s TVO on the fragile state of the eastern hognose snake in Ontario.
Tiger keelback snakes are both venomous (it’s a rear-fanged colubrid) and poisonous, thanks to the toads they feed on. The snakes store the toad toxins in their nuchal glands. But do they know they’re packing toad toxins? According to a new study, yes: the snakes’ defensive behaviour changes depending on the toxicity of their diet. [Journal of Comparative Psychology]
Sean Graham has some advice for field herpers: instead of spending money and effort on finding rare species for your life list, they should spend that on field work that might actually do some good. “Imagine if instead of trying to find their lifer Pigmy Rattlesnake in Apalachicola National Forest, they instead went looking for them in central Alabama where records are few and patchy? If instead of herping for fun, everyone made their herping count?”1
Using the Internet to identify snakes is definitely a thing; I’ve gotten my share of requests. Sierra, the Sierra Club’s magazine, looks at how the Snake Identification Facebook group does the job. Turns out the challenges the group faces are as much about social dynamics—dealing with frivolous requests, not attacking people for killing snakes—as they are scientific.
Pollution is turning sea snakes black. The Turtle-headed Sea Snake (Emydocephalus annulatus) normally has a banded pattern (see above), but individuals found in polluted waters around New Caledonia are increasingly melanistic. It’s a phenomenon called “industrial melanism”: melanin tends to bind to metal ions of trace elements like arsenic and zinc; melanism and an increased shed cycle allows these snakes to rid themselves of toxic metals. [Current Biology]
Speaking of sea snakes, say hello to the Yellow Sea Snake (Hydrophis platurus xanthos), a newly discovered subspecies of the Yellow-bellied Sea Snake that is found in the warm, turbulent, anoxic waters of Golfo Dulce, off the Pacific coast of Costa Rica [Zoo Keys]
And what is almost certainly the weirdest reptile story ever to come to my attention: a story about turtle boners. No wait, it’s better than you think! It’s really difficult to figure out a turtle’s sex. So researchers came up with the idea of—oh boy—using a vibrator to stimulate the turtle: male turtles would get an erection. So: turtle boners. In the study, the method had a 100 percent accuracy rate. Because: turtle boners. Science is awesome. That is all. [Acta Herpetologica]
Spring is here, and the garter snakes (Thamnophis) are busily mating away — and that means mating balls where as many as a hundred frenzied males may be trying to woo a single female snake. That frenzy may be harder on the males than the females: a new study found that telomere length — associated with stress — decreased with males as they aged, but did not do so with females. [Proc. R. Soc. B]
Ontario has banned the hunting of Common Snapping Turtles (Chelydra serpentina), a species that had previously been regulated as game wildlife (with seasons and bag limits). Conservationists have long argued that any take is unsustainable, and they’re right: turtles simply reproduce too slowly, and face too many other dangers (roadkill, nest predation) — they’re simply in too much trouble already.
In other good news, the Arizona snake shot — allowing snakes to be shot within city limits — bill died in a tie vote in the state senate.
Cobra venom is largely neurotoxic — it shuts down a prey animal’s autonomic nervous system — but some cobra venoms have cytotoxic, or tissue-destroying, qualities, most famously the venoms of African spitting cobras. Cytotoxins are painful but not as lethal as neurotoxins, so you’d think that cytotoxic venoms in cobras developed as a defense mechanism. But it turns out that cytotoxins don’t correlate with spitting, but with spectacular hoods: the more brightly banded or coloured a cobra species’ hood, the more cytotoxins in the venom. [Toxins]