FIGURE 4 in New specimens of Helicops boitata (Serpentes: Dipsadidae: Hydropsini), with data on morphological variation and behavior

FIGURE 4. Behavioral records of individuals of Helicops boitata maintained in captivity during a period of three days. (A) An individual almost completely buried in the sand of the terrarium, keeping only the head above the surface; (B) two individuals exhibiting the upright posture of the snout, leaning the trunk to a nearly 90° position above the water surface; (C) an individual swimming in open water; (D) detail of the emerging head of an individual in the upright posture of the snout.