▪ Abstract It has recently been argued that the paradox of hel** behavior in birds has been
solved. This optimism may be premature. I argue that there is no obvious dichotomy …

Large brains provide adaptive cognitive benefits but require unusually high, near-constant
energy inputs and become fully functional well after their growth is completed …

Three main benefits are thought to underlie communal roosting in birds: a reduction in
thermoregulation demands, a decrease in predation risk, and an increase in foraging …

We studied the ontogeny of diving behaviour in the Galápagos fur seal (Arctocephalus
galapagoensis, Heller 1904). Six-month-old seals spent less than 12% of observation time …

Summary 1 Foraging behaviours of the Australian sea lion (Neophoca cinerea) reflect an
animal working hard to exploit benthic habitats. Lactating females demonstrate almost …

It has been suggested that the evolution of cooperative breeding in birds is associated with
unusually long periods of offspring dependence; this appears paradoxical because …

Understanding how marine top predators exploit their environment is a central topic in
marine ecology. Among all methodologies used to investigate this part of ecology, electronic …

Fitness can be profoundly influenced by the age at first reproduction (AFR), but to date the
AFR–fitness relationship only has been investigated intraspecifically. Here, we investigated …

Providing food to develo** offspring is beneficial for offspring but costly for carers.
Understanding patterns of provisioning thus yields important insights into how selection …

Self‐feeding precocial development is associated with high energy requirements and
potentially vulnerable to short‐term reductions in food availability, yet few studies have …