Rattlesnake's Scales Help Them Sip Water From Their Bodies - FaunaClassifieds
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Old 01-11-2020, 10:52 PM   #1
bcr229
Rattlesnake's Scales Help Them Sip Water From Their Bodies

This is pretty cool to watch.

https://scitechdaily.com/rattlesnake...how-video/amp/

During storms in the southwestern U.S., some rattlesnakes drink rain droplets from scales on their backs. This unusual behavior could help them survive in a desert environment with infrequent rain. Now, researchers have figured out how the nanotexture of scales from these snakes helps them use their bodies to harvest rain. They report their results in ACS Omega.

The western diamondback rattlesnake (Crotalus atrox) from southern Arizona and other areas of the U.S. Southwest has been seen emerging from its den to harvest rain, sleet, and even snow. The snake flattens its body and often forms a tight coil, presumably to maximize the area for water-gathering. As rain droplets coalesce on its back, the slithery reptile sucks water from the scales. Gordon Schuett, Konrad Rykaczewski and colleagues wanted to take a closer look at rattlesnake scales to determine what makes these serpents so adept at harvesting precipitation.

The researchers compared the surface wettability and nanotexture of scales from the western diamondback rattlesnake and two other species of desert-dwelling snakes that do not show rain-harvesting behavior: the desert kingsnake and the Sonoran gopher snake. The team dropped water onto the snakes’ backs, finding that the droplets beaded up, coalesced and stuck to the rattlesnake’s scales, whereas they formed shallow puddles that often slipped off the other snakes’ bodies. Scanning electron microscopy of rattlesnake scales revealed nanochannels that form a labyrinth-like network, but scales from the other two snakes did not show these same features. The rattlesnake’s dorsal scales aid in water collection by providing a sticky, hydrophobic surface that “pins” water droplets to the surface, the researchers say.

Reference: “Role of Scale Wettability on Rain-Harvesting Behavior in a Desert-Dwelling Rattlesnake” by Akshay Phadnis, Kenneth C. Manning, Gordon W. Schuett and Konrad Rykaczewski, 3 December 2019, ACS Omega.
DOI: https://pubs.acs.org/doi/10.1021/acsomega.9b02557

The authors acknowledge funding from the Biomimicry Center at Arizona State University.
 

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