Acoustic Identification bats of Antigua and Barbuda

Family

Molossidae

Scientific name

Tadarida brasiliensis (I. Geoffroy, 1824)

Taxonomy follows Simmons and Cirranello (2022)

Call shape

QCF single pulses of decreasing frequency may include short FM pulses. NOTE: Commuting calls may be considerably lower than the dominant harmonic of  the Fc and are generally "flat looking" narrow band pulses of longer duration.

Calls of this species are extremely variable depending on what the bats were doing when recorded.

See notes for additional details.

Vocal signature parameters

Parameters    N Min Max Mean St.Dev 10% 25% 75% 90%
Dur 10,624 2.0 31.5 9.9 4.1 3.4 6.5 13.0 14.5
TBC 10,322 2.2 3469.1 236.8 159.4 71.4 156.0 302.8 369.6
Fmin 10,624 10.9 56.3 23.4 2.4 20.6 21.9 24.8 26.4
Fmax 10,624 18.4 66.7 29.8 7.1 23.0 24.8 33.2 40.2
BW 10,624 0.1 40.4 6.4 6.3 1.1 2.0 8.7 15.6
Fmean 10,624 15.5 59.9 25.8 3.3 22.1 23.5 27.7 30.2
Fk 10,624 18.1 62.5 26.7 3.7 62.5 24.3 28.5 30.6
FCH1 10,624 8.4 28.2 12.4 1.6 10.8 11.4 13.1 13.9
Fc 10,624 16.7 56.3 24.7 3.3 21.5 22.7 26.2 27.9
FcH3 10,624 25.1 84.5 37.1 4.9 32.3 34.1 39.3 41.8
Sc 10,624 -212.3 499.8 33.8 58.1 3.9 8.1 28.7 80.1
Pmc 10,624 0.0 152.4 20.0 20.1 3.2 6.5 26.5 46.7

Source of acoustic data

Chris Corben recordings

Known distribution

  • Antigua
  • Barbuda
  • Redonda - possible

    • Conservation status

    Least concern

    Barquez et al., (2015)

    Notes

    This will be the bat with the lowest frequencies found on the islands. Calls are extremely variable and range considerably higher and overlap with calls of M. molossus.

    Like all species in the genus, M. molossus search phase calls have the distinctive "two note" sequence that will differentiate it from Taderida..

    A note of caution: Kaleidoscope classifiers generally confuse calls of all species in the genus Molossus with Taderida where geographic ranges overlap.

    Citations

    Barquez, R., Diaz, M., Gonzalez, E., Rodriguez, A., Incháustegui, S. & Arroyo-Cabrales, J. 2015. Tadarida brasiliensis. The IUCN Red List of Threatened Species 2015: e.T21314A22121621. 

     

    Lindsay, K., G. Kwiecinski, J.-P. Bacle, A. Thibou, and C. Wallace. 2017. Bats of Antigua and Barbuda their importance and conservation. Federation Family Publishing House, St. George's, Antigua.

     

    Simmons, N. B., and A. L. Cirranello. 2022.. Bat Species of the World: A taxonomic and geographic database. www.batnames.org.

    Acoustic Identification bats of Antigua and Barbuda2022, all rights reserved.