Invited Review Abstract Cooperation and conflict are ubiquitous features of life in the vast
majority of animals and can occur over a wide range of functional contents and at various …

Animal Traditions maintains that the assumption that the selection of genes supplies both a
sufficient explanation of the evolution and a true description of its course is, despite its …

The high incidence of hybridization in waterfowl (ducks, geese and swans) makes this bird
group an excellent study system to answer questions related to the evolution and …

This paper presents a list, compiled from the literature, of bird species in which intraspecific
nest parasitism (INP) occurs. INP was reported in 234 species: one Struthioniformes, two …

Paternity has been hypothesized to be related to the evolution of paternal care because (1)
there should be selection for males not to invest in broods with an uncertain parentage, or …

Sex differences in parasitism are common and may depend on sex differences in intensity of
sexual competition, immunosuppression, or exposure to parasites. We used a large data set …

To understand interspecific patterns in the strength of sexual selection, variation in the costs
and benefits of exercising mate choice needs to be evaluated. One manifestation of sexual …

Cultural transmission is thought to be a mechanism by which migratory animals settle into
habitats, but little evidence exists in wild populations because of the difficulty of following …

Avian species differ markedly in the extent to which males contribute to prehatching and
posthatching parental care. In a recent comparative study, Mø ller and Birkhead (1993) …

The goose is one of the most ancient of domesticated birds now bred commercially.
Whereas the greatest concentration of the world's geese is to be found in Asia, there is …