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| Sound produced | yes, active sound production |
| Type of sound produced | snaps, clicks & scrapes (sporadic broadband sounds produced by stridulation) |
| Sound production organ | probably teeth |
| Sound mechanism | not known, but probably stridulation of teeth or bones |
| Behavioural context | spontaneous nocturnal sound production associated with foraging activities |
| Reference | Tiepelt, H., 2005 |
| Remark | outdoor recording (freshwater lake). No spontaneous sound production was recorded in captivity. |