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We used telemetry to track the movements of the females of two sympatric green pit viper species, Cryptelytrops macrops and Viridovipera vogeli, in north-eastern Thailand. This has generated information on their home ranges, lengths of displacements, and vertical niche partitioning. Five female vipers were tracked simultaneously within the same general habitat for 78 days in the cold, dry season for a mean of 113.6 ± 5.38 (range: 101 - 129) fixes. The data show that V. vogeli had larger home ranges and greater displacements than C. macrops (0.49 ± 0.02 and 0.26 ± 0.07 ha, 38.01 ± 9.72 and 25.12 ± 2.40 m; respectively). Interestingly, V. vogeli selected arboreal sites significantly more frequently (mean 53.0 ± 14.4 % of observations, range 38.6 - 67.5) than sympatric C. macrops (mean 23.4 ± 13.2 %, range 5.3 - 49.2). We cautiously suggest that vertical stratification of these two sympatric vipers may be one factor facilitating the co-existence of otherwise morphologically similar species. [ABSTRACT FROM AUTHOR]

Rural communities and agricultural landscapes serve as important areas for biodiversity, yet study of snakes in these fragmented environments is severely lacking. Hospital records indicate that green pit vipers (Trimeresurus spp.) inflict the highest number of venomous snakebites of any snake group in the Nakhon Ratchasima, Pak Thong Chai, and Wang Nam Khieo rural regions of north-east Thailand, causing debilitating injuries and, subsequently, negative perceptions of these species. We utilised radio telemetry to assess male and female Trimeresurus albolabris (N = 1, N = 1) and T. macrops (N = 2, N = 7) movements and home ranges in rural portions of the the Sakaerat Biosphere Reserve in north-east Thailand from October 2015 through January 2017. Green pit vipers of both species were tracked for a mean of 97.6 ± 15 days (median = 88, range 35-190). They moved a mean distance of 26.3 ± 3.32 meters between locations (median = 25.11, range 13.2-50.4) and exhibited mean minimum convex polygon home ranges of 0.14 ± 0.043 hectares (median = 0.095, range 0.006-0.423). Big-eyed green pit vipers (T. macrops) differed in movement patterns and home range size by sex and fecundity, although not statistically so. Understanding green pit viper space use will aid in future conservation and snakebite mitigation efforts for this interesting but severely understudied group. [ABSTRACT FROM AUTHOR]

The article discusses study on the resting substrate utilization, habitat occupancy, altitudinal preference, size/age class distribution and encounter rate estimates of three sympatric pitviper species, Hypnale hypnale, Trimeresurus macrolepis in the Cardamon Hills of Western Ghats Mountain Range, southern India. The study found that the resource pattern of Trimeresurus malbaricus overlaps with that of Hypnale hypnale and Trimeresurus macrolepis, but mutually exclusive, non-overlapping resource use pattners were noted on Hypnale hypnale and Trimeresurus macrolepis.

The article discusses the diving behavior and underwater apnoea, the suspension of external breathing, duration of Trimeresus malabaricus Malabar pit viper in the tropical moist evergreen forest of Agumbe in Karnataka, India. Topics mentioned the retraction of the snake's body with its head in a submerged downward position, the time it takes the snake to remain apnoeic, and the tendency of the snake to develop apnoea relative to the usage of an aquatic habitat.