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ULTRASONIC EMISSIONS OF THE LESSER HORSESHOE BAT RHINOLOPHUS HIPPOSIDEROS (BECH.)
Author(s) -
KAY L.,
PICKVANCE T. J.
Publication year - 1963
Publication title -
proceedings of the zoological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0370-2774
DOI - 10.1111/j.1469-7998.1963.tb01607.x
Subject(s) - juvenile , human echolocation , range (aeronautics) , geography , sound (geography) , acoustics , fishery , environmental science , biology , ecology , physics , engineering , aerospace engineering
The ultrasonic emissions of both adult and juvenile Lesser Horseshoe bats have been studied. Two features were observed:—The range of frequencies used by adult bats when congregated in a crowd of 60 or more does not exceed 3 Kc/s, even though their frequency of emission is of the order of 113 Kc/s. The baby bats can make sounds of echo‐location type within 3 days of birth; they open their mouths to do so when disturbed and the frequency of the sound at first is about 30 kc/s. Erratic variations in frequency take place during development.