What the Camera Captured Inside the Roost<\/p>\n
The study, published in the journal PLOS One<\/a>, provides the first detailed description of social behavior in a wild Vampyrum spectrum group. Researchers Marisa Tietge, Eduardo Artavia Dur\u00e1n, and Mirjam Kn\u00f6rnschild placed the camera approximately two meters from the bats\u2019 primary roosting site inside a living Manilkara chicle tree in the tropical dry forest of Guanacaste, Costa Rica. The camera captured footage over sixty days, triggered by movement each time a bat entered or exited.<\/p>\n The group consisted of four individuals. Based on observable features including size differences, the visibility of the female\u2019s teats, and the eventual visibility of the male\u2019s penis, the researchers identified them as a breeding pair and two offspring from different years. The older pup remained with the parents after the birth of a new pup, indicating extended cohabitation unusual among carnivorous bats. Background information on the species from the Animal Diversity Web<\/a> confirms that these bats typically form small roosting groups consisting of a mated pair and their young.<\/p>\n Data from the recordings showed the bats engaged in eight main types of behavior, including social interactions, food provision, and play. Bats returning to the roost with prey were observed voluntarily transferring food to younger bats. In one sequence, the adult male brought prey to the lactating female. <\/p>\n The study notes that this prey provision likely serves as a method for adults to transition young bats from milk to a carnivorous diet, allowing them to practice handling large prey items before they are capable of hunting on their own. An overview published by IFLScience<\/a> describes the species as the largest carnivorous bat in the world, with a wingspan approaching one meter.<\/p>\n Physical Bonds Between Hunters<\/p>\n The footage also documented physical interactions that researchers had not anticipated. When a bat returned to the roost after an absence, another bat would greet it by wrapping a wing around its body in what the researchers described as a social greeting similar to a hug. Bats regularly groomed each other and made social vocalizations. When the group settled to sleep, they formed a tight cluster described in the study as a cuddle ball, with each bat wrapping one wing around its nearest neighbor and all snouts touching. <\/p>\n The study challenged previous assumptions about foraging behavior. For decades, researchers assumed Vampyrum spectrum hunted alone. The camera data showed multiple instances of bats leaving or returning to the roost together. <\/p>\n The report notes that this suggests they sometimes undertake cooperative foraging trips, perhaps as a way for younger bats to develop hunting skills. Prey transfer from the adult male to the lactating female was also observed, further supporting the idea that foraging is not strictly solitary. A EurekAlert news release<\/a> covering the findings emphasized that these observations represent the first documented evidence of food sharing and social greetings in wild spectral bats.<\/p>\n Lead author Marisa Tietge said in a statement: \u201cWe were astonished by how gentle and cooperative these apex predators are.\u201d She added: \u201cThe most endearing behavior was forming a tight cuddle ball when falling asleep: each bat wrapping one wing around its nearest neighbor, all snouts touching.\u201d<\/p>\n Forest Loss and the Fragility of Family Groups<\/p>\n![\"The](\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2026\/02\/the-spectral-bat-1200x424.jpg\")
The spectral bat has long been described as a solitary predator with a three foot wingspan that hunts across Neotropical forests. Credit: INaturalist<\/p>\n![\"Roost](\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2026\/02\/roost-with-the-four-vampyrum-spectrum-individuals-1200x1059.jpeg\")
Roost with the four\u00a0Vampyrum spectrum\u00a0individuals (presumably male, female, and two pups). Credit: PLOS One\u00a0\u00a0<\/p>\n![\"Spectral](\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2026\/02\/spectral-bats-vampyrum-spectrum-are-both-the-largest-carnivorous-bat-species-and-the-western-hemisph.jpeg\")
Spectral bats (Vampyrum spectrum) are both the largest carnivorous bat species and the Western Hemisphere\u2019s largest bat. Credit: INaturalist<\/p>\n![\"Illustrations](\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2026\/02\/illustrations-of-prey-provision-behavior-between-two-bats-1200x1129.jpeg\")
Illustration credit: Emma Dittrich<\/p>\n