We confirmed a new nest predator for the Mexican endemic and endangered Sierra Madre Sparrow (Xenospiza baileyi). We found a Mexican dusky rattlesnake (Crotalus triseriatus) preying on three 6-day-old nestlings while their parents and a neighboring sparrow showed active defensive behavior. We also identified C. triseriatus as a new bird nest predator.
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10 October 2019
A new bird nest predator: Mexican dusky rattlesnake (Crotalus triseriatus) predation on Sierra Madre Sparrow (Xenospiza baileyi) nestlings
Annamaria Savarino-Drago,
Irene Ruvalcaba-Ortega
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Mexican dusky rattlesnake
new nest predator
Sierra Madre Sparrow
subalpine grassland
Trans-Mexican Volcanic Belt