In Reply to: one theory... posted by Erik - NM on April 28, 2003 at 13:55:47:
there are several other genera of small, tan black headed/capped colubrids, several of which also eat centipedes I believe...
genus Unechis - Australia genus Pseudocyclophis - Middle east and central Asia genus Rhynchocalamus - Middle East/Africa genus Eirenis - Middle East genus Apparalactus - Southern Africa - some members of this genus have a pattern just like a Tantilla and are centipede specialists as well
Correlation? Who knows! It has always been interesting to me that there are so many "tan with black headed" burrowing snakes in arid regions of the world.