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- Curtin, Paul C. P.; Hauber, Mark E.; Moller, Peter
- Journal of ethology 2011 v.29 no.3 pp. 487-491
- Macaca fuscata; adults; aggression; correlation; monkeys; zoos; New York
- ... Mutual gaze occurs when two animals simultaneously look at each other, and therefore signals reciprocal visual attention. We studied the occurrence of mutual gaze among adult female Japanese monkeys (Macaca fuscata) housed at the Central Park Zoo in New York City (USA). We found that the frequency of mutual gaze varied according to one aspect of social context (proximity), and that monkeysâ age- ...
- Lee, Sang-im; Seo, Kyungseon; Lee, Wonyoung; Kim, Woohjung; Choe, Jae Chun; JabÅoÅski, Piotr
- Journal of ethology 2011 v.29 no.3 pp. 401-407
- Pica pica; adults; birds; breeding; nestlings; nests
- ... We report the first case of non-parental infanticide in the Black-billed Magpie Pica pica. Using a video camera installed in the victimsâ nest, we recorded repeated visits (over 4Â days) of an adult (each time one bird) who attacked six nestlings at each visit until they died or were evicted. The nest was one of 58 nests filmed over four breeding seasons. Collected evidence suggests that the per ...