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Greater sac-winged bat
Conservation status
Least Concern  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Chiroptera
Family:	Emballonuridae
Genus:	Saccopteryx
Species:	S. bilineata
Binomial name
Saccopteryx bilineata (Temminck, 1838)
Greater sac-winged bat range

The greater sac-winged bat (Saccopteryx bilineata) is a bat of the family Emballonuridae native to Central and South America.

They are the most common bats seen in the rainforest, as they often roost on the outside of large trees. They are insectivores and use echolocation calls through the mouth to track their prey, which includes flies, beetles, butterflies and moths. The long nose and upper lip are highly mobile and can shift upward to enlarge the mouth opening.

The term "sac-winged" refers to small pouches on the wings. These sacs are used by males to attract females and to mark their harem territory. During daily grooming, males will fill these sacs with drops of urine and glandular secretions. During displays for females, the male will hover in front of the female and fan her vigorously to expose her to the scent of the mixture in the wing sacs. Males will also shake the contents of the sac towards bats outside of the male's harem territory to warn off intruders. Microbial fermentation in the sac may produce identifiable scent signals.

Sac-wing pups have been recorded making various calls in a jumbled context. For example, a female pup will give the male trill of courting followed by echolocation clicks then adult territorial challenges. These mixed-up vocalizations have been equated with human infant babbling and mispronounced songs of young birds. This is the first example of mammal babbling outside of the primate order.

References

1. Solari, S. (2015). "Saccopteryx bilineata". IUCN Red List of Threatened Species. 2015: e.T19804A22004716. doi:10.2305/IUCN.UK.2015-4.RLTS.T19804A22004716.en.
2. Simmons, N.B. (2005). "Order Chiroptera". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 390. ISBN 978-0-8018-8221-0. OCLC 62265494.
3. "Saccopteryx bilineata (Greater Sac-winged Bat)" (PDF). The Online Guide to the Animals of Trinidad and Tobago. UWI.
4. "Saccopteryx bilineata (Greater sac-winged bat)". Animal Diversity Web.
5. Voigt, CC; von Helversen, O (December 1999). "Storage and display of odour by male Saccopteryx bilineata (Chiroptera, Emballonuridae)". Behavioral Ecology and Sociobiology. 47 (1–2): 29–40. doi:10.1007/s002650050646. S2CID 11339644.
6. Voigt, C. C.; Caspers, B.; Speck, S. (2005). "Bats, Bacteria, and Bat Smell: Sex-Specific Diversity of Microbes in a Sexually Selected Scent Organ". Journal of Mammalogy. 86 (4): 745. doi:10.1644/1545-1542(2005)086[0745:BBABSS]2.0.CO;2. ISSN 1545-1542. pdf Archived 31 March 2012 at the Wayback Machine
7. Knornschild, M; Behr O; von Helversen O (September 2006). "Babbling behavior in the sac-winged bat (Saccopteryx bilineata)". Naturwissenschaften. 93 (9): 451–4. doi:10.1007/s00114-006-0127-9. PMID 16736178. S2CID 33556162.

• IUCN Red List least concern species
• Bats of South America
• Bats of Brazil
• Mammals of Colombia
• Saccopteryx
• Bats of Central America
• Mammals described in 1838