Mammals
Hairy-Legged Vampire Bat
Diphylla ecaudata · also called hairy-legged vampire bats
Rarely encountered even by researchers, the hairy-legged vampire bat feeds almost entirely on the blood of birds, a genuinely ancient lineage among the world’s three vampire bat species and one of the least studied bats found anywhere in the Americas.
Overview
The hairy-legged vampire bat, Diphylla ecaudata, is a blood-feeding mammal native to forest habitat across a range extending from Mexico through Central America and into parts of South America. Its status as the most ancient vampire bat lineage, near-total dietary specialisation on bird blood, and genuine rarity make it one of the more scientifically intriguing and least understood blood-feeding bats found anywhere in the world.
The oldest branch of a strange family tree
Long before the more familiar common vampire bat evolved, the hairy-legged vampire bat’s lineage had already split off on its own evolutionary path, making this rare, bird-blood specialist a genuine living link to the deep history of the vampire bat family.
Status
Least Concern, though its genuine rarity and elusive habits make precise population trends difficult for researchers to establish with confidence.
Hairy-Legged Vampire Bat: common questions
Why is the hairy-legged vampire bat considered the most ancient vampire bat?
This species is regarded by researchers as representing the most ancient evolutionary lineage among the three known vampire bat species, based on genetic and anatomical studies that place it as an earlier-branching relative of the common and white-winged vampire bats.
What does the hairy-legged vampire bat eat?
This species feeds almost entirely on bird blood, a stronger dietary specialisation toward birds than shown by either of its two vampire bat relatives, obtained through a small bite followed by lapping the flow using anticoagulant-laced saliva.
Why is the hairy-legged vampire bat named that?
This species has noticeably hairier hind legs than its vampire bat relatives, a distinctive physical feature that is reflected directly in its common name and helps distinguish it from the common and white-winged vampire bats.
Why is the hairy-legged vampire bat rarely studied?
This species is considered genuinely rare and elusive compared with the more familiar common vampire bat, and this scarcity has resulted in comparatively limited detailed behavioural data being available to researchers studying the species.