Greater sac-winged bat
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. 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 of S. bilineata. 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.
Photographer: Dave Saunders