Many important questions in ecology and evolutionary biology can only be answered with
data that extend over several decades and answering a substantial proportion of questions …

▪ Abstract Extra-pair paternity (EPP) is extremely variable among species of birds, both in its
frequency and in the behavioral events that produce it. A flood of field studies and …

Molecular techniques used to assign paternity have revealed previously unknown
incidences of extra-pair paternity in socially monogamous bird species. DNA fingerprinting …

Abstract The Evolution of Avian Breeding Systems deals with three of the most conspicuous
and fascinating aspects of the reproductive biology of birds: sexual selection, parental care …

Molecular techniques have revealed striking variation among bird species in the rates of
extra–pair paternity (EPP) and intraspecific brood parasitism (IBP). In terms of the proportion …

Environmentally-induced fluctuation in the form and strength of natural selection can drive
the evolution of morphology, physiology, and behavior. Here we test the idea that fluctuating …

Summary 1 Between 1988 and 2001, we studied social relationships in the superb fairy‐
wren Malurus cyaneus (Latham), a cooperative breeder with male helpers in which extra …

Two alternative hypotheses have been proposed to explain how social and genetic mating
systems are interrelated in birds. According to the first (male trade-off) hypothesis, social …

Background Female promiscuity is highly variable among birds, and particularly among
songbirds. Comparative work has identified several patterns of covariation with social …

We tested for an association between divorce rate and site fidelity in 42 avian species
belonging to the order Ciconiiforms, using comparative methods that account for the …