Abstract:
The morphology and ecology of Agkistrodon intermedius in Yan′an, Shaanxi province was preliminarily studied through sixteen samples, which was collected during august 2006. The results showed that their snout-vent length was 310～557 mm. the mid-body dorsal scales of the most samples were 23, with the minor of 22 or 25 rows. Number of ventrals plus subcaudal scales was 193 to 207, with an average number of 199.4±5.0. As to the ecology, they were mainly seen in the farmland and around the farmhouse, while their food consisted of field mouse, sparrow and lizard, all were small animals living in the habitat. The population density surveyed by quadrat sampling method of three clary sage fields was 24.39/km2, and the sex ratio (♂/♀) was approximately 9∶1.
