A highly unusual, idiosyncratic and learned call that sounds like a distant lorry, foghorn or didgeridoo with a fundamental frequency of 50 Hz (similar to trucks) and highly variable in duration (range: 685 ms to almost 15 seconds). This sound is unlike any call in the normal repertoire of African elephants.
Malaika, one of the Tsavo orphans, imitates the sounds of trucks on the Mombasa Road, three kilometers from her enclosure. (Tsavo East, Kenya)
