作者: H. Bender
DOI: 10.1111/J.1469-7998.2005.00038.X
关键词:
摘要: Most species of the family Macropodidae (kangaroos and wallabies) make a distinctive foot thump by striking ground with their hind feet when they detect potential danger. I used eastern grey kangaroo Macropus giganteus as model to examine (1) acoustic characteristics structure thump, (2) social context in which free-ranging kangaroos thumped approached human observer on (3) intended recipient signal. Thumps were about two-thirds second length, generally composed two noisy pulses, had majority signal energy below 7 kHz. Only adult kangaroos, both sexes, observed thump. A higher proportion solitary than grouped visibility was poor, either because habitat type or low light levels. Given thumps given, appears be predator three possible functions: startle, detection deter pursuit.