Diclidurus albus Wied-Neuwied, 1819 (Mammalia, Chiroptera): Geographic Distribution in Honduras, with New Records Inferred from Acoustic Evidence and Morphology

Bats (Mammalia, Chiroptera) from Yuscarán in Eastern Honduras: Conservation and acoustic characterization for the insectivorous species

“…In this study, M. molosus, presented frequencies similar to those of low frequencies registered by Miller (2003), nevertheless the frequencies found here contrast with the descriptions of O'Farrell & Miller (1999), which provide a mean frequency of 34.1 kHz for the lowest pulses and 39.7 kHz for the highest frequency. M. nigricans emitted vocalizations that are within the range documented by Gómez-Corea et al (2021) in different regions of Honduras, and conforms to the portion of high frequency recorded by Miller (2003), the Fmax and Fmin coincide with that reported by Kraker-Castañeda et al (2013) in Mexico, (cited as M. rufus). It should be noted the presence of these three species in urban environments, it can be attributed to the fact that some species of this genus have a certain adaptive plasticity to disturbance conditions (Jung & Kalko, 2011).…”

“…Bat calls were manually identified through a series of acoustic characteristics and standard measurements: maximum frequency (Fmax), minimum frequency (Fmin), mean frequency (Fmean), characteristic frequency (Fc), characteristic slope (Sc), duration of each pulse (Dur). Finally, the structure (shape) and quantitative characteristics of the vocalizations were compared with reference works by Kalko (1995);O'Farrell & Miller (1997); Miller (2003); Barataud et al, 2013;Jung et al (2007Jung et al ( , 2014, MacSwiney et al (2008); Orozco-Lugo et al (2013); Gómez-Corea et al (2021) and the records of a reference acoustic library, obtained from previous monitoring in different regions of Honduras, using the hand release method in open areas; recordings at the exit of the shelters and in flight rooms. Functional traits of insectivorous bats that will be used to describe the structure of calls: frequency modulated (FM), quasi-constant frequency (QCF), constant frequency (FC) and frequency maximum energy (FME) Schnitzler et al, 2003).…”

“…Undoubtedly, it is necessary to carry out more studies in the YBR and surroundings to know the possible fluctuations of the bat populations, implementing monitoring in the medium and long term, in addition in this sampling design did not include several months of the year and therefore, effort sampling may be insufficient to detect some species and in some calls analysed the samples are not representative to see the full range of vocalization of insectivorous bats. In Honduras, new studies should employ include methods for the upper stratum, using a combination of acoustic methods and mist nets (Gómez-Corea et al, 2020), focusing on standardized acoustic monitoring that provides information to create an acoustic reference library. The range of variation inherent in the vocal repertoire of each species should be established, given the relevance of geographic variation and intraspecific and interspecific variations.…”

New confirmed record of Diclidurus albus Wied-Neuwied, 1820, Northern Ghost Bat (Mammalia, Chiroptera, Emballonuridae), in northern Costa Rica

“…Additionally, observations on the natural history of D. albus are few. This bat species prefers roosting in vegetation with large leaves, like palms (Ceballos and Medellín 1988;Hood and Gardner 2008), but some individuals also roost in human constructions (Moscoso and Tirira 2009;Gómez-Corea et al 2020). Our new record complements the little knowledge available on the distribution of D. albus in northern Costa Rica, and it corroborates the presence of this species in human settlements.…”