Behaviour 2019
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Echolocation pulses of insectivorous bats from southwest Colombia
Johana A. Arévalo Cortés1, Jhon E. Tulcan Flores1, Danny Zurc2, Silvia A. Montenegro Muñoz3, Jhon J. Calderon Leyton4, Ronald A. Fernández Gómez3,5. 1Grupo de Investigación en Ecología Evolutiva, Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad de Nariño, Pasto, Outside US/Canada, Columbia; 2Centro de Ciencia Museo de Ciencias Naturales de La Salle, Instituto Tecnológico Metropolitano, Medellin, Outside US/Canada, Columbia; 3Asociación GAICA - Grupo de Amigos para la Investigación y Conservación de las Aves, Pasto, Outside US/Canada, Columbia; 4Departamento de Biología, Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Ciudad Universitaria Meléndez, Cali, Outside US/Canada, Columbia; 5Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Outside US/Canada, Mexico

Acoustic monitoring has been shown to be complementary to conventional methods, thus obtaining more complete inventories and avoiding alterations in usual foraging activities. We describe and analyzed the differences between the acoustic parameters of insectivorous bats present in southwest Colombia. We made recordings from December 2017 to May 2020 in the Andean and Pacific region of Nariño Department. A total of 143 free flight sequences were analysed, belonging to the families Vespertilionidae, Molossidae and Emballonuridae of which eight species were recorded. M. riparius and L. blossevillii were first registered at Nariño Department. The species Myotis albescens, M. keaysi, M. riparius and Lasiurus. blossevillii belonging to the family Vespertilionidae had pulses of modulated frequency with a quasi-constant final part, those of the family Molossidae: Molossus molossus and Tadarida brasiliensis and Promops centralis, constant and quasi-constant pulses, and Saccopteryx bilineata belonging to the family Emballonuridae, quasi-constant frequencies. This study enriches the efforts that have been made in resolving the classification of species of insectivorous bats in the region.