Reproductive success usually declines in the course of the season, which may be a direct
effect of breeding time, an effect of quality (individuals with high phenotypic or environmental …

Many studies have reported statistically significant associations between bird migratory
phenology and climatic variables, and, consequently, it is mostly accepted that recent shifts …

Physiological Adaptations for Breeding in Birds is the most current and comprehensive
account of research on avian reproduction. It develops two unique themes: the consideration …

The first comprehensive review of all aspects of the biology of moult, drawing information
from across the literature and in all birds, from penguins to passerines. Feathers are …

Although a negative trade-off between current reproductive effort and future reproductive
output has for long been hypothesized and in some cases empirically shown, no mechanism …

1. Recently, there has been much interest in physiological trade‐offs between parasite
resistance and fitness‐related traits such as secondary sexual characters or reproductive …

Sexual displays often involve several different ornamental traits. Yet most indicator models
of sexual selection based on a single receiver (usually a choosy female) find that multiple …

Seasonal variation in reproductive success is a common phenomenon in many taxa. In
birds, the costs and benefits associated with alternative breeding dates cause variation in …

We discuss the mechanistic (" proximate") and selective (" ultimate") factors that cause life
history trade-offs such as the trade-off between offspring quality and quantity and that …

Individuals of the same species differ consistently in risky actions. Such 'animal
personality'variation is intriguing because behavioural flexibility is often assumed to be the …