The relative contribution of extrinsic and intrinsic factors affecting lizard movement patterns have rarely been examined. We were interested in understanding the effects of extrinsic factors such as seasonality and forest cover, along with the intrinsic factor of body length on home range size, movement patterns and habitat selection of the endangered Guatemalan Beaded Lizard (Heloderma charlesbogerti). We predict that home ranges, core areas and movement patterns will be reduced in the dry season compared to those of the wet season. Twelve individuals (five males and seven females) were radio tracked for 4–9 months from April 2007 to April 2008. We used minimum convex polygon for home range comparison with other helodermatid studies. Guatemalan Beaded Lizards showed larger home ranges than other helodermatids. We determined annual and seasonal home range size and core areas using kernel density estimators. Turning angles and step lengths were also determined to assess the effect of the extrinsic and intrinsic factors on the movement patterns of the lizards. Dry season home ranges and core areas were substantially smaller and its associated lizard movement patterns showed shorter step lengths and smaller turning angles than those of the wet season. Larger lizards also presented larger home ranges. When estimating dry forest selection within their home ranges, lizards with larger annual home range size and more forest cover within their home range showed higher selection for dry forest habitat. These findings showed the differential response of Guatemalan Beaded Lizards to seasonality and highlights the relevance of the conservation of the remnants of well-preserved dry forest on the ability of this species to cope with drought and habitat destruction.

很少研究影响蜥蜴运动方式的外在因素和内在因素的相对贡献。我们有兴趣了解外部因素（如季节性和森林覆盖率）的影响，以及体长对濒危危地马拉串珠蜥蜴（Heloderma charlesbogerti）的家境大小，活动方式和栖息地选择的内在影响）。我们预计，与雨季相比，旱季的房屋范围，核心区域和移动方式将有所减少。从2007年4月至2008年4月，对12个人（五名男性和七名女性）进行了4-9个月的无线电跟踪。我们使用最小凸多边形将其范围与其他嗜血性皮炎研究进行了比较。危地马拉串珠蜥蜴的居所范围比其他嗜血蜥蜴大。我们使用核密度估计器确定了年度和季节性家庭范围的大小和核心区域。还确定了转弯角度和步长，以评估外部因素和内在因素对蜥蜴运动方式的影响。与雨季相比，旱季的主场范围和核心区域要小得多，其相关的蜥蜴运动模式显示出更短的步长和更小的转向角。更大的蜥蜴也表现出更大的家庭范围。在估算其家园范围内的干旱森林选择时，具有年度家园范围较大且其家园范围内森林覆盖率更高的蜥蜴对干旱森林栖息地的选择较高。这些发现表明危地马拉串珠蜥蜴对季节性的不同反应，并强调了保存完好的干燥森林残余物的保存与该物种应对干旱和栖息地破坏的能力的相关性。年度居所范围较大且其居所范围内森林覆盖率更高的蜥蜴显示出对干燥森林栖息地的更多选择。这些发现表明危地马拉串珠蜥蜴对季节性的不同反应，并强调了保存完好的干燥森林残余物的保存与该物种应对干旱和栖息地破坏的能力的相关性。年度居所面积较大且其居所范围内森林覆盖率更高的蜥蜴显示出对干燥森林生境的更多选择。这些发现表明危地马拉串珠蜥蜴对季节性的不同反应，并强调了保存完好的干燥森林残余物的保存与该物种应对干旱和栖息地破坏的能力的相关性。