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<p>Carnivorous bats are species that feed&#xa0;on&#xa0;terrestrial vertebrates year-round or seasonally, a food habit observed in four families. Within Phyllostomidae, <i>Chrotopterus auritus</i> is one of the largest Neotropical bat species with a diet mainly consisting of small vertebrates. Few studies have detailed the diet of carnivorous bats throughout the year. Here, we recorded the diet of a family group of <i>C. auritus</i> weekly during a year in the northernmost location of its distribution, in the Los Tuxtlas&#xa0;region&#xa0;(Mexico). Dietary items were collected from guano in a cave roost. The food items were separated and classified [mammal, bird, insects and unidentified soft-tissue], dried and weighed, and identified to the lowest possible taxonomic level based on morphological characteristics. We recorded each item as a single incidence to calculate frequency and abundance. We estimated prey category diversity using morphospecies richness. Prey morphospecies diversity did not differ between the dry and windy seasons, but both had higher diversity than the rainy season. Mammal remains had the highest biomass (62.41% of sample weight) and were consumed especially during the rainy season, as well as bird remains. Insects peaked in the windy season but were found all year. We found that this group of <i>C. auritus</i> preys on vertebrates during its reproductive season and pup-rearing period, while relying on insects as a year-round food source.</p>

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Dietary variation in a family group of the woolly false vampire Bat (Chrotopterus auritus, Phyllostomidae) at the north of its distribution

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Silvia Mónica Cerecedo-Jiménez,
  • Pedro Adrián Aguilar-Rodríguez,
  • M. Cristina MacSwiney G.,
  • Martín Alarcón Montano,
  • Viridiana Vega-Badillo,
  • Nallely Verónica Rodríguez Santiago,
  • José Luis Aguilar López

摘要

Carnivorous bats are species that feed on terrestrial vertebrates year-round or seasonally, a food habit observed in four families. Within Phyllostomidae, Chrotopterus auritus is one of the largest Neotropical bat species with a diet mainly consisting of small vertebrates. Few studies have detailed the diet of carnivorous bats throughout the year. Here, we recorded the diet of a family group of C. auritus weekly during a year in the northernmost location of its distribution, in the Los Tuxtlas region (Mexico). Dietary items were collected from guano in a cave roost. The food items were separated and classified [mammal, bird, insects and unidentified soft-tissue], dried and weighed, and identified to the lowest possible taxonomic level based on morphological characteristics. We recorded each item as a single incidence to calculate frequency and abundance. We estimated prey category diversity using morphospecies richness. Prey morphospecies diversity did not differ between the dry and windy seasons, but both had higher diversity than the rainy season. Mammal remains had the highest biomass (62.41% of sample weight) and were consumed especially during the rainy season, as well as bird remains. Insects peaked in the windy season but were found all year. We found that this group of C. auritus preys on vertebrates during its reproductive season and pup-rearing period, while relying on insects as a year-round food source.