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... Science Frontiers ONLINE No. 61: Jan-Feb 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Egg Mimicry In Cuckoos In Britain, cuckoos mainly parasitize five species of smaller birds. They do this by laying their eggs in the hosts' nests. After hatching, the young cuckoos grow much faster than the young of the host species. Soon the cuckoo is able to eject the host's young from the nest and get all the food brought by the parents. Actually, the cuckoo is so aggressive in this business of parasitization that, when it finds a host nest with eggs so far along in incubation that parasitization is impractical, it destroys the whole nest. This usually forces the host birds to lay fresh eggs, giving ... Science Frontiers ONLINE No. 61: Jan-Feb 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Egg Mimicry In Cuckoos In Britain, cuckoos mainly parasitize five species of smaller birds. They do this by laying their eggs in the hosts' nests. After hatching, the young cuckoos grow much faster than the young of the host species. Soon the cuckoo is able to eject the host's young from the nest and get all the food brought by the parents. Actually, the cuckoo is so aggressive in this business of parasitization that, when it finds a host nest with eggs so far along in incubation that parasitization is impractical, it destroys the whole nest. This usually forces the host birds to lay fresh eggs, giving ...
Terms matched: 2 - Score: 816 - 15 May 2017 - URL: /sf061/sf061b07.htm
... recent issue of BioScience, R.B . Payne authored an excellent review of brood parasitism in birds. Brood parasites lay their eggs in the nests of other species, which then incubate the eggs and raise the alien chicks. The parent parasites are thus free to forage, hang out, and parasitize more nests. Brood parasitism is such a successful and easy way of life that 136 species of cuckoos, 5 species of cowbirds, 20 finches, and South America's Blackheaded Duck have adopted it. Brood parasitism fascinates ornithologists because it involves war between the parasites and their hosts. Since host species may eject parasite eggs or fail to nurture parasite chicks, brood parasites have evolved mimicry as a powerful weapon in these battles. Mimicked are host eggs, host nestlings, and host vocalizations. ... Science Frontiers ONLINE No. 119: Sep-Oct 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Murder In The Nest In a recent issue of BioScience, R.B . Payne authored an excellent review of brood parasitism in birds. Brood parasites lay their eggs in the nests of other species, which then incubate the eggs and raise the alien chicks. The parent parasites are thus free to forage, hang out, and parasitize more nests. Brood parasitism is such a successful and easy way of life that 136 species of cuckoos, 5 species of cowbirds, 20 finches, and South America's Blackheaded Duck have adopted it. Brood parasitism fascinates ornithologists because it involves war between the parasites and their hosts. Since host species may ...
Terms matched: 2 - Score: 462 - 15 May 2017 - URL: /sf119/sf119p04.htm
... Claws BBA20 Wing Spurs BBA21 The Alula or Bastard Wing BBA22 Some Curiosities of Avian Feet BBA23 Inherited Callosities BBA24 Unusual Pouches on Birds BBA25 Luminous Birds BBA26 Odoriferous Birds BBA27 Egg Complexity and Sophistication BBA28 Bird Eggs: Color, Pattern and Size Curiosities BBA29 Egg Mimicry BBA30 Mimicry of Other Species and the Environment BBA31 Remarkable Convergences of Appearance and Habits BBA32 Frightmolt BBA33 The Hollow in the Back of the Young Common Cuckoo BBB AVIAN BEHAVIOR BBB1 Avian Intelligence BBB2 Complexity and Sophistication of Avian Mental Processes BBB3 Enigmas of Instinct BBB4 Anomalous Altruism: Hard to Find BBB5 The Aesthetic Sense in Birds BBB6 Calculated Deception: Birds That Cry "Wolf" BBB7 Avian Play BBB8 Anomalous Aerial Tumbling and Erratic Flight BBB9 Leks: Why Did They Evolve? BBB10 Cooperative Displays on Leks BBB11 Enigmatic Dancing, Flying, Singing BBB12 Anting BBB13 ... Sex Ratios of Offspring BBA4 Vividly Colored and Highly Patterned Avian Plumages and Ornaments BBA5 Plumage Polymorphism BBA6 Females with Male Plumage BBA7 Molting before Hatching BBA8 Unusual Diversification and Conservation in Plumage BBA9 Complexity and Sophistication of Feathers BBA10 Complexity and Sophistication of Feather Color-and-Pattern-Generation Mechanisms BBA11 Unusual Plumage-Color Changes BBA12 Feather Curiosities BBA13 Neoteny in Feathers BBA14 Tooth Substitutes in Modern Birds BBA15 Birds Lacking Egg Teeth BBA16 Extreme Sexual Dimorphism in Bills BBA17 Bill Polymorphisms BBA18 Avian Bills: Unusual Adaptations BBA19 Wing Claws BBA20 Wing Spurs BBA21 The Alula or Bastard Wing BBA22 Some Curiosities of Avian Feet BBA23 Inherited Callosities BBA24 Unusual Pouches on Birds BBA25 Luminous Birds BBA26 Odoriferous Birds BBA27 Egg Complexity and Sophistication BBA28 Bird Eggs: Color, Pattern and Size Curiosities BBA29 Egg Mimicry BBA30 Mimicry of Other Species and the Environment ...
Terms matched: 2 - Score: 416 - 15 May 2017 - URL: /cat-biol.htm
... Science Frontiers ONLINE No. 61: Jan-Feb 1989 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Interproximal grooving of teeth A MAMMOTH FRAUD IN SCIENCE Astronomy Celestial burlesque? Biology Gaia at work under the hudson Celestial crucible Celestial influences Egg mimicry in cuckoos Synchronous rhythmic flashing of fireflies Are you saturated with discussions about the "infinite dilution" Geology Terrestrial maria? Chaos below Geophysics Expanding ball of light (ebl) phenomenon Unusual gust of wind Sodium surges over illinois Psychology Remote, extrasensory description of mineral samples General Spooky stats in maryland A TRULY FORTEAN HOUSE ...
Terms matched: 2 - Score: 316 - 15 May 2017 - URL: /sf061/index.htm
