Sac-winged Bats
Sac-winged Bats
Emballonuridae
The Scent-Communicating Insect Hunters: Sac-winged Bats (Emballonuridae) are a distinctive group of small to medium-sized bats found mainly in tropical and subtropical regions of Central and South America, Africa, Asia, and parts of Australia. They get their name from the unique glandular sacs located on their wings or arms, primarily in males, which they use to produce and spread scent for communication and mating displays. There are around 50 species of Sac-winged Bats, including the Greater Sac-winged Bat (Saccopteryx bilineata) and the Amazonian Sac-winged Bat (Saccopteryx gymnura). These bats are usually brown, gray, or black with subtle markings, and some species have pale stripes along their back or wings. Their body length ranges from 4 to 10 cm (1.5 to 4 in), with relatively long, narrow wings adapted for fast and agile flight. Sac-winged Bats are insectivorous, feeding on a wide variety of flying insects such as moths, beetles, and flies. They typically hunt in open spaces near forest edges, water bodies, or clearings. Their echolocation calls are well-adapted for detecting fast-moving prey in cluttered environments. These bats are also known for their social behavior. Many species roost in small groups in caves, hollow trees, under leaves, or in human structures. Males use their wing sacs to release scents, especially during mating seasons, to attract females or mark their territory. Communication within the group includes scent-marking, vocalizations, and even visual displays. Sac-winged Bats play an essential role in controlling insect populations and maintaining ecosystem balance.