Diet of Crotalus enyo (Serpentes: viperidae) from the Baja California Cape Region, Mexico

Crotalus enyo is a rattlesnake endemic to Baja California peninsula, Mexico. The natural history of this species is poorly known, so the goal of this study was to determine the diet of C. enyo in the Cape Region, an area with different conditions than the rest of the peninsula. We analyzed the stomach contents of 24 specimens obtained during 2010-2013, and identified the ingested prey. The diet of C. enyo consists of rodents (83.34%) and lizards (16.66%), although presents a diverse diet, the data suggest C. enyo is a specialist predator at Cape Region. We didn’t find differences in diet composition between sexes, site of capture, or season. This study documents three new prey items in the diet of C. enyo: the Orange-Throated Whiptail (Aspidocelis hyperythra), the Cape Spiny-Tailed Iguana (Ctenosaura hemilopha) and Hunsaker’s Spiny Lizard (Sceloporus hunsakerii).Crotalus enyo is a rattlesnake endemic to Baja California peninsula, Mexico. The natural history of this species is poorly known, so the goal of this study was to determine the diet of C. enyo in the Cape Region, an area with different conditions than the rest of the peninsula. We analyzed the stomach contents of 24 specimens obtained during 2010-2013, and identified the ingested prey. The diet of C. enyo consists of rodents (83.34%) and lizards (16.66%), although presents a diverse diet, the data suggest C. enyo is a specialist predator at Cape Region. We didn’t find differences in diet composition between sexes, site of capture, or season. This study documents three new prey items in the diet of C. enyo: the Orange-Throated Whiptail (Aspidocelis hyperythra), the Cape Spiny-Tailed Iguana (Ctenosaura hemilopha) and Hunsaker’s Spiny Lizard (Sceloporus hunsakerii)

Diet of Crotalus enyo (Serpentes: viperidae) from the Baja California Cape Region, Mexico

Crotalus enyo is a rattlesnake endemic to Baja California peninsula, Mexico. The natural history of this species is poorly known, so the goal of this study was to determine the diet of C. enyo in the Cape Region, an area with different conditions than the rest of the peninsula. We analyzed the stomach contents of 24 specimens obtained during 2010-2013, and identified the ingested prey. The diet of C. enyo consists of rodents (83.34%) and lizards (16.66%), although presents a diverse diet, the data suggest C. enyo is a specialist predator at Cape Region. We didn’t find differences in diet composition between sexes, site of capture, or season. This study documents three new prey items in the diet of C. enyo: the Orange-Throated Whiptail (Aspidocelis hyperythra), the Cape Spiny-Tailed Iguana (Ctenosaura hemilopha) and Hunsaker’s Spiny Lizard (Sceloporus hunsakerii)

The Mexican Patch-nosed Snake, Salvadora mexicana (Duméril, Bibron & Duméril, 1854; Squamata: Colubridae): a new state record for Zacatecas, Mexico, and a new prey species

Mexico, Zacatecas, Municipality of Valparaiso, ca. 2 km (airline) west of San Juan Capistrano, (22.637258° N; 104.118608° W [WGS84]; 1249 m elevation), 18 July 2017. Collected by Jorge A. Bañuelos-Alamillo. The snake was deposited in the Vertebrate Collection at Universidad Autónoma de Aguascalientes (CZUAA-REP-690); a photo voucher is also available at the San Diego Natural History Museum (SDSNH_HerpPC_05366). Adult female (SVL= 900 mm, TL= 380 mm), and had 17 midbody dorsal scales, 188 ventral scales, 106 subcaudals, nine supralabials, 11 infralabials, two loreal scales, one preocular, and three postoculars on both sides (Fig. 1-A). The snake was road-killed near a river within dry forest vegetation and had recently consumed an adult male Aspidoscelis gularis scalaris ingested headfirst.Asociación Herpetológica Argentin

The Mexican Patch-nosed Snake, Salvadora mexicana (Duméril, Bibron & Duméril, 1854; Squamata: Colubridae): a new state record for Zacatecas, Mexico, and a new prey species

Mexico, Zacatecas, Municipality of Valparaiso, ca. 2 km (airline) west of San Juan Capistrano, (22.637258° N; 104.118608° W [WGS84]; 1249 m elevation), 18 July 2017. Collected by Jorge A. Bañuelos-Alamillo. The snake was deposited in the Vertebrate Collection at Universidad Autónoma de Aguascalientes (CZUAA-REP-690); a photo voucher is also available at the San Diego Natural History Museum (SDSNH_HerpPC_05366). Adult female (SVL= 900 mm, TL= 380 mm), and had 17 midbody dorsal scales, 188 ventral scales, 106 subcaudals, nine supralabials, 11 infralabials, two loreal scales, one preocular, and three postoculars on both sides (Fig. 1-A). The snake was road-killed near a river within dry forest vegetation and had recently consumed an adult male Aspidoscelis gularis scalaris ingested headfirst.Asociación Herpetológica Argentin

The Mexican Patch-nosed Snake, Salvadora mexicana (Duméril, Bibron & Duméril, 1854; Squamata: Colubridae): a new state record for Zacatecas, Mexico, and a new prey species

Mexico, Zacatecas, Municipality of Valparaiso, ca. 2 km (airline) west of San Juan Capistrano, (22.637258° N; 104.118608° W [WGS84]; 1249 m elevation), 18 July 2017. Collected by Jorge A. Bañuelos-Alamillo. The snake was deposited in the Vertebrate Collection at Universidad Autónoma de Aguascalientes (CZUAA-REP-690); a photo voucher is also available at the San Diego Natural History Museum (SDSNH_HerpPC_05366). Adult female (SVL= 900 mm, TL= 380 mm), and had 17 midbody dorsal scales, 188 ventral scales, 106 subcaudals, nine supralabials, 11 infralabials, two loreal scales, one preocular, and three postoculars on both sides (Fig. 1-A). The snake was road-killed near a river within dry forest vegetation and had recently consumed an adult male Aspidoscelis gularis scalaris ingested headfirst.Asociación Herpetológica Argentin

Trophic interaction between Thamnophis sumichrasti (Squamata, Natricidae), Isthmura gigantea (Caudata, Plethodontidae), and Megacormus gerstchi (Scorpiones, Euscorpiidae)

We report for the first time multitrophic interaction among Thamnophis sumichrasti (Squamata, Natricidae), Isthmura gigantea (Caudata, Plethodontidae), and Megacormus gerstchi (Scorpiones, Euscorpiidae), three endemic, rare and endangered species that inhabit cloud forests and pine-oak forests from Sierra Madre Oriental in México, which provides novel data on their natural history and distribution