Reptiles orientation

CHEMORECEPTION IN THE HOMING AND ORIENTATION BEHAVIOR OF AMPHIBIANS AND REPTILES, WITH SPECIAL REFERENCE TO SEA TURTLES... 

One could broadly define chemical orientation to include food-finding and reproductive behaviors where chemoreception is involved however, we have chosen not to discuss these better known areas of amphibian and reptile behavior. On the other hand, where semiochemicals or conspecific habitat marking appear to have a function in home range factors or homing to a specific site, we have chosen to include the available data in this discussion. 

Researchers have not found it easy to design experiments that clearly indicate chemoreception to be the primary orientation system in amphibians and reptiles. In many cases (e.g., newts such as Taricha or chelonlans such Clemmys or Chelonia) chemoreception has been singled out as important for homing more by a process of elimination of the other senses than by sound laboratory and field research. 

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