Many putative examples of coevolution do not stand up to critical analysis. A rigorous
definition of coevolution requires that a trait in one species has evolved in response to a trait …

Most parent birds face the decision of whether to spend time and energy caring for their
offspring or to conserve their resources to survive and breed later. Should a parent care for …

Publisher Summary The chapter describes a simple economic model that predicts in a
qualitative way on how costs (lost feeding opportunity and risk) interact to produce an …

lmost a decade has passed since we started advocating a process of usability design [20-
22]. This article is a status report about the value of this process and, mainly, a description of …

At first sight just a small brown bird, the dunnock's unobtrusive appearance belies its
extraordinary behaviour and mating patterns. In this book Nick Davies gives a full account of …

SYNOPSIS. We report results of a three year comparative laboratory study of kin recognition
abilities in Arctic ground squirrels (Spermophilus parryii) and Belding's ground squirrels (S …

(1) There was no difference in the distinctiveness of egg markings between species that
have interacted strongly with cuckoos and species that have not, nor in intra-clutch variation …

Sex differences in dispersal and inter-group transfer by birds and mammals are often
considered to be evolved responses to the phenomenon of inbreeding depression. This …

Birds parasitized by interspecific brood parasites often adopt defences based on egg
recognition but such behaviours are puzzlingly rare in species parasitized by members of …

To understand the co-existence of rejection and acceptance of cuckoo eggs within a host
population, the mechanism of egg discrimination and the cost-benefit balance of rejection …