why do sidewinder snakes anchor themselves across the sand in the desert???

Question: why do sidewinder snakes anchor themselves across the sand in the desert???
- Keywords:
  desert,
  movement,
  sand,
  sidewinder snake,
  snake
Asked by ludev13 to Charlotte, Jo, Kevin, Louise, Valeria on 19 Jun 2012.
- Joanna Cruden answered on 19 Jun 2012:
  
  I have looked this up and they don’t anchor themselves, but I guess it may seem like they do because the throw their head forward and then drag the rest of their body behind them to move sideways over the sand

ludev13 commented on 21 Jun 2012:

aha thats so cool! thanks:)

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Question: why do sidewinder snakes anchor themselves across the sand in the desert???