Breeding decisions in birds involve both mate and nest choice, and there is increasing evidence that social influences may modulate individual choices. Female preferences may be affected by other females' preferences and mutual choice cannot always be excluded, which makes the whole pattern more complex than assumed by most sexual selection models. Social… (More)
The aim of the present study was to investigate the effects of video presentations of natural landscapes on European starlings' (Sturnus vulgaris) stereotypic behaviours (SBs) and other abnormal repetitive behaviours (ARBs) and to evaluate the impact of past experience by comparing wild-caught and hand-reared starlings' reactions. Ten wild-caught and five… (More)
Social animals are always searching for conspecifics, thereby expressing a genuine “social need”. This need is illustrated by the fact that social isolation can induce isolation syndromes that can be attenuated by devices such as mirrors. Social contacts appear to be so vital for social animals that they may be ready to work to obtain social stimulations.… (More)
Newborn infants prefer faces to all other visual displays. All previous studies of face recognition in newborns used schematic faces, photographs or static real faces. In our study, we used video films to explore, for the first time, recognition of talking faces, in newborns. Our results suggest that video films of talking faces are very salient stimuli for… (More)
Quantitative data on neurohormones (brain-hormones) steroïd hormones, juvenile hormones, in an insect : Bombyx mori are outlined. The variations of hormonal contents throughout larval and pupal development, in eggs and ovocytes are analyzed.