I always have just taken this as a sign of excitement from the snake, be it rattlesnake, indigo, Madagascar Ground Boa or python. My female BHP showed this when I introduced the male last time.

Best of luck with the BHP's.

Doug T

>>I just introduced my male to the female BHP and the female is wriggling her tail and excreted a very small amount of a substance. I am trying to figure out if she is receptive or is she annoyed?

Doug Taylor Reptiles