Abstract

course of an ongoing mark-recapture investigation of the ecology of a montane snake community in the Animas Mountains, Hidalgo Co., New Mexico. A male C. w. obscurus (188 g, 580 mm snout-vent length [SVL]) first captured 7 October 1998 was recaptured 2 June 1999. A miniature radio-transmitter was then surgically implanted in the body cavity and the specimen was released 3 days later at its capture location at an elevation of 2,240 m. The snake was located daily and moved an average of 23.6 m each day (SE = 7.0, range = 0-78.4) from 7 to 20 June 1999. From 14 to 20 June the snake contained an exceptionally large prey bulge. Post-prandial thermophily may have increased exposure to predators and compromised agility may have increased vulnerability (Garland and Arnold, 1983; Ford and Shuttlesworth, 1986). On 21 June at 1600 h a portion of the snake (University of New Mexico, Museum of Southwest Biology, Division of Herpetology, MSB 61426) containing the radio-transmitter was found 14 m from the snake's location the

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