Click on a button to run the corresponding video clip.
| Click Button | Behaviour | Description | Locality, Date | Author |
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Duet song excerpt | A complete great call sequence starting with several booms and a ululating-II scream by the male. The male sits on the right, the female left, and the juvenile in-between. The female produces several false starts of her great call. The juvenile cannot be heard to vocalise and may be silent. In this pair, the final ululating scream-II is typically produced by the female. | Dortmund Zoo, Germany, 15 May 2004 | Andrea About |
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Duet song excerpt | A complete great call sequence and the beginning of the following interlude sequence. The clip starts with several booms and a few short barks by the male. The male sits on the left, the female right, and the juvenile above them. The juvenile is also heard calling in the middle of the great call sequence. A male Nomascus gabriellae and a male Hylobates lar can also be heard singing in the background. | Doué-la-Fontaine, France, 19 July 2004 | Andrea About |
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Social communication: embrace and back offer | One siamang embraces another (tactile gesture), then offers its back for grooming. | Howletts, U.K., June 2000 | Katja Liebal |
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Social communication: throwback head, play | A juvenile siamang repeatedly throws his head backwards (visual gesture) and looks at another siamang. The addressee starts to play with the juvenile. | Howletts, U.K., June 2000 | Katja Liebal |
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Social communication: throwback head, sex | The adult female throws her head backwards (visual gesture) and looks at the adult male. The male begins to copulate with her, but a juvenile quickly approaches and kicks the female, upon which the pair separates. | Krefeld, group 2, July/Aug. 2000 | Katja Liebal |
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Social communication: full open-mouth | A juvenile grooms the mother's face and receives an moderate open mouth threat (facial expression), then both direct full open-mouth threats at the adult male who is observing them. | ?, 2000 | Katja Liebal |
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Social communication: pull | One siamang pulls another's arm (tactile gesture). The recipient returns the gesture and starts to groom the initiator of the exchange. | Krefeld, group 2, July/Aug. 2000 | Katja Liebal |
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Social communication: shake rope | One siamang repeatedly shakes a rope on which another siamang is sitting (tactile gesture). The receiver approaches, then both start to chase each other. | Krefeld, group 2, July/Aug. 2000 | Katja Liebal |
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Social communication: wrist offer | A subadult female chasing her juvenile brother bumps into the adult male and receives a long open mouth-threat (facial expression) from him. She produces a twitter (vocal signal) and offers her wrist (visual gesture) which she puts directly into her father's mouth, an apparently submissive signal. This part of the clip is then repeated in slow-motion. | Krefeld, group 2, July/Aug. 2000 | Katja Liebal |
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