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The hammer-headed bat (Hypsignathus monstrosus), also known as hammer-headed fruit bat, big-lipped bat, and hammerhead bat, [2] [3] is a megabat widely distributed in West and Central Africa. It is the only member of the genus Hypsignathus , which is part of the tribe Epomophorini along with four other genera.
Internal organs of the hammerhead bat. Horseshoe bats (of the family Rhinolophidae) are a bat genus that possess air pouches, or chambers, around their larynx which act as Helmholtz resonators. [1] The male hammerhead bat has an extremely large larynx that extends through most of his thoracic cavity, displacing his other internal organs. [35]
Provides a comprehensive tool for analyzing and comparing high-resolution full-spectrum sonogram of bat echolocation calls recorded from time-expansion bat detectors. Sound Analysis Pro 2011 [9] GPL v2: Windows: Performs automated recording and analysis of animal vocalization. It can record, analyze and manage sound data over prolonged periods.
At the UK National Bat Conference, Wildlife Acoustics announced the Echo Meter handheld bat detector. [8] The device will be available in December 2011. The detector is capable of monitoring for bats using heterodyne, frequency division or Real Time Expansion (RTE). RTE is Wildlife Acoustics proprietary technique for shifting bat sounds to the ...
Tube-nosed fruit bats such as the eastern tube-nosed bat (Nyctimene robinsoni) have stereo olfaction, meaning they are able to map and follow odor plumes three-dimensionally. [68] Along with most (or perhaps all) other bat species, megabats mothers and offspring also use scent to recognize each other, as well as for recognition of individuals. [67]
Frequency division (FD) bat detectors synthesise a sound which is a fraction of the bat call frequencies, typically 1/10. This is done by converting the call into a square wave, otherwise called a zero crossing signal. This square wave is then divided using an electronic counter by 10 to provide another square wave.
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To avoid this type of jamming, bats typically wait enough time for echoes to return from all possible targets before making the next sound. This can be seen clearly when a bat attacks an insect. The bat produces sounds with progressively shorter time intervals, but always allowing enough time for sounds to travel to the target and back. [6]