Cuckoo
Cheating by Nature
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٥٫٠ - ١ تقييم
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- 17٫99 US$
وصف الناشر
A gifted biologist's careful and beguiling study of why cuckoos have got away with tricking other birds into hatching and raising their young for thousands of years.
The familiar call of the common cuckoo, "cuck-oo," has been a harbinger of spring ever since our ancestors walked out of Africa many thousands of years ago. However, for naturalist and scientist Nick Davies, the call is an invitation to solve an enduring puzzle: how does the cuckoo get away with laying its eggs in the nests of other birds and tricking them into raising young cuckoos rather than their own offspring?
Early observers who noticed a little warbler feeding a monstrously large cuckoo chick concluded the cuckoo's lack of parental care was the result of faulty design by the Creator, and that the hosts chose to help the poor cuckoo. These quaint views of bad design and benevolence were banished after Charles Darwin proposed that the cuckoo tricks the hosts in an evolutionary battle, where hosts evolve better defenses against cuckoos and cuckoos, in turn, evolve better trickery to outwit the hosts.
For the last three decades, Davies has employed observation and field experiments to unravel the details of this evolutionary "arms race" between cuckoos and their hosts. Like a detective, Davies and his colleagues studied adult cuckoo behavior, cuckoo egg markings, and cuckoo chick begging calls to discover exactly how cuckoos trick their hosts. For birding and evolution aficionados, The Cuckoo is a lyrical and scientifically satisfying exploration of one of nature's most astonishing and beautiful adaptations.
PUBLISHERS WEEKLY
British field ornithologist Davies (Cuckoos, Cowbirds, and other Cheats) dials into the parasitic behavior of Britain's favorite harbinger of spring, the cuckoo, as he details the "evolutionary arms race" between cuckoos and their hosts, which yields adaptations and behavior that seem exquisitely well-tuned, but sometimes incomprehensibly sloppy. He walks readers through Wicken Fen, his fieldwork site for more than 30 years, carefully observing the clever manipulations of cuckoos and their targets: reed warblers, wagtails, meadow pipits, and dunnocks. With meticulously designed experiments, Davies discovered the intricacies of egg mimicry, part of an "egg arms race between cuckoos and hosts." He explains some of the more complex host behaviors within a Darwinian framework, addressing the cost-benefit assessments that host parents must make to determine if they should remove a dubious egg, attack a potentially predatory nest invader that could just be a cuckoo mimic, or feed a hyperstimulated cuckoo chick that is mimicking the sounds of the host brood. Davies's bird story is satisfying not only for his strong conclusions and well-maintained focus, but because it also highlights the value of scientific observation. B&w illus., color insert.
