Ecuadorian Sac-Winged Bat

Scientific Name: Balantiopteryx infusca

facing an extremely high risk of extinction in the wild.

Key Facts:
  • Conservation Status: Critically Endangered
  • Kingdom: Animalia
  • Phylum: Chordata
  • Class: Mammalia
  • Order: Chiroptera
  • Family: Emballonuridae
  • Genus: Balantiopteryx
  • Species: B. infusca

  • The Ecuadorian sac-winged bat (Balantiopteryx infusca) is a species of sac-winged bat in the family Emballonuridae. It is found in Colombia and Ecuador. According to the IUCN Red List of Threatened Species, the population trend is decreasing for this species, due to habitat destruction through deforestation. In 2013, Bat Conservation International listed this species as one of the 35 species of its worldwide priority list of conservation.

    Balantiopteryx infusca is the sister species of Balantiopteryx io.
    There are no subspecies.

    It is larger than Balantiopteryx io, and smaller than Balantiopteryx plicata.  It lacks the white trim of Balantiopteryx plicata, and is darker in color.

    It is found in the mouth of caves, abandoned mines, and cracks in rock. It prefers to live where there is plenty of light. These bats are sociable and live in colonies; they are also insectivorous

    Biology and behavior
    Chestnut sac-winged bats forage for insects in openings and gaps just below and around the forest canopy. They are active primarily just after dusk and just before dawn, spending the day resting in cavities in trees or fallen logs. They live in small groups of up to five individuals, each with no more than a single female. The bats' echolocation calls consist of three short pulses, each higher in pitch than the last, and rising from 25 to 32 kHz. This frequency optimises the detection of flying insects at long range. Breeding has been reported to take place between April and May in Panama, but may occur at different times of the year elsewhere.

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    A critically endangered (CR) species is one that has been categorized by the International Union for Conservation of Nature (IUCN) as facing an extremely high risk of extinction in the wild.


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