| Records |
| Author |
Emery, N.J.; Clayton, N.S. |
| Title |
The Mentality of Crows: Convergent Evolution of Intelligence in Corvids and Apes |
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Journal Article |
| Year |
2004 |
Publication |
Science |
Abbreviated Journal |
Science |
Volume  |
306 |
Issue |
5703 |
Pages |
1903-1907 |
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| Abstract |
Discussions of the evolution of intelligence have focused on monkeys and apes because of their close evolutionary relationship to humans. Other large-brained social animals, such as corvids, also understand their physical and social worlds. Here we review recent studies of tool manufacture, mental time travel, and social cognition in corvids, and suggest that complex cognition depends on a “tool kit” consisting of causal reasoning, flexibility, imagination, and prospection. Because corvids and apes share these cognitive tools, we argue that complex cognitive abilities evolved multiple times in distantly related species with vastly different brain structures in order to solve similar socioecological problems. |
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10.1126/science.1098410 |
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Equine Behaviour @ team @ |
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2959 |
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Emery, N.J.; Seed, A.M.; von Bayern, A.M.P.; Clayton, N.S. |
| Title |
Cognitive adaptations of social bonding in birds |
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Journal Article |
| Year |
2007 |
Publication |
Philosophical Transactions of the Royal Society B: Biological Sciences |
Abbreviated Journal |
Phil. Trans. Biol. Sci. |
| Volume |
362 |
Issue |
1480 |
Pages |
489-505 |
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The “social intelligence hypothesis” was originally conceived to explain how primates may have evolved their superior intellect and large brains when compared with other animals. Although some birds such as corvids may be intellectually comparable to apes, the same relationship between sociality and brain size seen in primates has not been found for birds, possibly suggesting a role for other non-social factors. But bird sociality is different from primate sociality. Most monkeys and apes form stable groups, whereas most birds are monogamous, and only form large flocks outside of the breeding season. Some birds form lifelong pair bonds and these species tend to have the largest brains relative to body size. Some of these species are known for their intellectual abilities (e.g. corvids and parrots), while others are not (e.g. geese and albatrosses). Although socio-ecological factors may explain some of the differences in brain size and intelligence between corvids/parrots and geese/albatrosses, we predict that the type and quality of the bonded relationship is also critical. Indeed, we present empirical evidence that rook and jackdaw partnerships resemble primate and dolphin alliances. Although social interactions within a pair may seem simple on the surface, we argue that cognition may play an important role in the maintenance of long-term relationships, something we name as “relationship intelligence”. |
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refbase @ user @ |
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3528 |
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Emery, N.J.; Clayton, N.S.; Frith, C.D. |
| Title |
Introduction. Social intelligence: from brain to culture |
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Journal Article |
| Year |
2007 |
Publication |
Philos Trans R Soc B |
Abbreviated Journal |
Philos Trans R Soc B |
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362 |
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Equine Behaviour @ team @ Emery2007 |
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6302 |
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Clayton, N.S.; Dickinson, A. |
| Title |
Episodic-like memory during cache recovery by scrub jays |
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Journal Article |
| Year |
1998 |
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Nature |
| Volume |
395 |
Issue |
6699 |
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272-274 |
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The recollection of past experiences allows us to recall what a particular event was, and where and when it occurred1,2, a form of memory that is thought to be unique to humans3. It is known, however, that food-storing birds remember the spatial location4, 5, 6 and contents6, 7, 8, 9 of their caches. Furthermore, food-storing animals adapt their caching and recovery strategies to the perishability of food stores10, 11, 12, 13, which suggests that they are sensitive to temporal factors. Here we show that scrub jays (Aphelocoma coerulescens) remember 'when' food items are stored by allowing them to recover perishable 'wax worms' (wax-moth larvae) and non-perishable peanuts which they had previously cached in visuospatially distinct sites. Jays searched preferentially for fresh wax worms, their favoured food, when allowed to recover them shortly after caching. However, they rapidly learned to avoid searching for worms after a longer interval during which the worms had decayed. The recovery preference of jays demonstrates memory of where and when particular food items were cached, thereby fulfilling the behavioural criteria for episodic-like memory in non-human animals. |
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0028-0836 |
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10.1038/26216 |
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Equine Behaviour @ team @ |
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4788 |
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