Integrative animal behaviour is on the rise: some behavioural neuroscientis
ts are increasingly asking 'why', while some behavioural ecologists are sta
rting to ask 'how'. For example, the most recent edition of Krebs and Davie
s' authoritative Behavioural Ecology: an Evolutionary Approach contains, fo
r the first time, a section on mechanistic analyses of behaviour within an
ecological context. This nascent synthesis can be catalysed by molecular ge
netic analyses of behaviours that occur in a natural context. Recent findin
gs can provide a foundation for increased integration in the study of socia
l behaviour, and provide the basis for an agenda for research on 'sociogeno
mics'.