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| Foreword | |
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| Preface to the 1999 Edition | |
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| Preface | |
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| Introduction | |
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| Charles Darwin | |
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| After Darwin | |
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| The first synthesis | |
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| Evolutionary inference | |
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| Plan of the book | |
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| Characteristics of the Islands | |
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| Origins and ages | |
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| Distribution and sizes | |
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| Climate | |
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| Plants, 2Z Vegetation | |
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| Changes in the past | |
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| Changes in recent times | |
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| Cocos Island | |
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| Summary | |
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| General Characteristics and Distributions of Finches | |
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| The main groups | |
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| Genera | |
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| Species | |
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| Subspecies | |
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| Distributions | |
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| Patterns among the islands | |
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| Extinctions | |
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| Other land birds | |
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| Summary | |
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| Patterns of Morphological Variation | |
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| Introduction | |
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| The major simple patterns | |
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| The minor simple patterns | |
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| Correlations between traits | |
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| Size | |
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| Allometry | |
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| Shape | |
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| Multivariate shape variation | |
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| Geographical variation in size | |
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| Summary | |
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| Growth and Development | |
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| Introduction | |
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| Variation in egg size | |
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| Absolute growth | |
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| Relative growth | |
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| Summary | |
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| Beak Sizes, Beak Shapes, and Diets | |
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| Introduction | |
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| Feeding mechanics | |
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| Feeding types | |
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| Ecological significance of beak differences between species | |
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| Dietary differences between species | |
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| Dietary differences between populations of the same species | |
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| Dietary differences among individuals in a variable population | |
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| Summary | |
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| The Importance of Food to Finch Populations | |
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| Introduction | |
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| Plant phenology in the and zone | |
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| Finch phenology | |
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| Finch populations in relation to food supply | |
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| Extreme conditions | |
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| Food limitation of population sizes | |
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| The frequency of food limitation | |
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| Other factors limiting finch populations | |
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| Interspecific competition for food | |
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| Summary | |
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| Population Variation and Natural Selection | |
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| Introduction | |
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| Relative variation | |
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| Theoretical background | |
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| Field studies | |
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| Genetic variation | |
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| Natural selection | |
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| Sexual selection | |
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| Countervailing selection | |
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| A summary of selection pressures | |
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| Sexual dimorphism | |
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| Genetic drift | |
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| Enhancement of genetic variation | |
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| Variation in relation to abundance, 20Z Other species | |
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| Summary | |
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| Species-Recognition and Mate Choice | |
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| Introduction | |
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| The possible cues used in species-recognition | |
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| Morphological cues | |
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| Song | |
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| Song and bill morphology as species cues | |
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| Imprinting | |
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| The learning of heterotypic song | |
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| Misimprinting | |
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| Beyond species-recognition: mate choice | |
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| Summary | |
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| Evolution and Speciation | |
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| Evolution | |
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| Origins | |
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| The number of species | |
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| The pattern of speciation | |
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| The time framework | |
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| Allopatric speciation | |
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| Alternative models of speciation | |
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| Parapatric speciation | |
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| Sympatric speciation | |
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| Alternatives to gradual genetic change | |
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| Conclusions and summary | |
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| Ecological Interactions during Speciation | |
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| Introduction | |
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| Ecological isolation | |
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| Causes of initial differentiation | |
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| An alternative view | |
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| Differentiation entirely in allopatry | |
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| The food supply hypothesis | |
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| Lack's evidence for competition | |
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| Tests of the competition hypothesis | |
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| Different explanations reconciled | |
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| Conclusions and summary | |
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| Competition and Finch Communities | |
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| Introduction | |
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| Combinations of species | |
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| Structure determined by competition | |
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| Minimum differences between coexisting species | |
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| Greater than minimum differences | |
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| A digression on methods of analysis, and on bias | |
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| Predictive models | |
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| The classical case of character release | |
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| Conclusions and summary | |
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| The Evolution of Reproductive Isolation | |
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| Introduction | |
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| Experimental tests | |
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| Implications of the experimental results | |
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| Reinforcement? | |
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| Absence of speciesfrom islands | |
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| Summary | |
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| Adapta | |