3/21/2023 0 Comments Juvenile chimpanzee hand![]() Pinches the moth with her hand and brings it close to her nose or mouth ![]() Pinches the moth with her hand or foot and holds it up in the air Grabs the moth together with fallen leaves and lays her body on a pile of leaves Sitting, lying supine, lying prone, rolling sideways, turning head over heels Puts a fore wing of the moth between her lips (Figure 1), sometimes shaking her head Puts the moth on the ground and hits it with her hands IM's behaviors toward the moth in relation to her body postures. When she was observed again 4 min later, she no longer had the moth. At 09:25, IM put the moth in her groin pocket and slowly walked away into the bush at 09:26, I lost sight of her because I could go no further into the bush. While IM was playing with the moth, IH approached her twice, and she responded playfully to him. Although IM frequently put the moth in her lips or touched it with her lip, she did not try to eat it. The moth sometimes fluttered its wings while being pinched between IM's fingers or lips. I summarize the behavioral patterns observed during IM's play in Table 1 (see Video 1). Given her occasional play face and play pant, IM's series of behaviors was regarded as playful. IM captured the moth without killing it and started to play with it, sometimes vigorously, sometimes calmly. Because my initial view was largely obstructed by dense bush, I moved to the side to gain a better view and started to take a video. Soon, IH's older sister, Imani (IM: a 6-year-old female), went to where the moth lay and started to investigate it. IH's mother, Ikocha (IK), immediately approached him, put him on her belly, moved away, and sat about 1 m away from the moth. Its body was thick, and its forewings were much longer than its hindwings. ![]() When IH touched the object with his finger, it moved, and I could then see that it was a large moth, about 5–6 cm in size and beige in color. a.m when Ichiro (IH: a 1-year-old male) emitted a slight huu call and was observed to be watching something on the ground. on 12 October 2004, two adult female chimpanzees and their offspring had been taking a rest under a dense bush since 08:54. The observation focused on chimpanzees in the M group at the Mahale Mountains National Park (see Nishida 2012 for details of the study site). Although chimpanzees frequently prey on several insect species (mostly social insects) ( e.g., McGrew 1992 Fuse 2013), Mahale chimpanzees eat moths only rarely (Nishida & Uehara 1983). This paper reports the case of a juvenile female chimpanzee at Mahale that captured and played with a live moth (Lepidoptera). However, it is possible that a chimpanzee may show an interest in a living organism for its animacy per se, with no intention of eating it. These reports compared such incidents with chimpanzees' hunting behaviors because it seems puzzling that the chimpanzees did not eat the meat. Wildlife Research Center, Kyoto University, JapanĪlthough it is not common for chimpanzees ( Pan troglodytes) to capture and toy with small mammals or birds without eating them, several reports have indicated that this does sometimes occur ( e.g., Hirata et al. ![]()
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