Publisher Summary Information warfare occurs when factions use and manage information
to gain an advantage over their rivals. It is common in diverse contexts ranging from identity …

The immunocompetence handicap hypothesis proposes that the immunosuppressive effect
of testosterone enforces honesty of sexual signalling via a physiological trade–off between …

The pace-of-life syndrome (POLS) hypothesis for animal personality proposes that variation
among individuals in life-history strategies is associated with consistent differences in …

Unlike most passerines, female superb fairy-wrens are prolific solo singers. Four hypotheses
for the function of female song were evaluated:(1) to defend territories;(2) to maintain contact …

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 …

In many species of monogamous birds females copulate with males other than their social
mates, resulting in extrapair fertilizations. Little is known about how females choose …

Kin selection is one of the mechanisms that can explain apparent altruism by subordinate
individuals in cooperatively breeding species, if subordinates boost the production of kin …

Many socially monogamous species paradoxically show signs of strong sexual selection,
suggesting cryptic sources of sexual competition among males. Darwin argued that sexual …

Studies of the patterns of diversification of birds on islands have contributed a great deal to
the development of evolutionary theory. In white–winged fairy–wrens, Malurus leucopterus …

Testosterone has been proposed as a physiological link between the level of sexual
signalling and male condition. Bright plumage is one of the most noticeable sexual signals …