Premise: In ethology and cognitive ethology, the hawk/goose effect refers to a behavior observed in some young birds when another bird flies above them: if the flying bird is a goose, the young birds show no reaction, but if the flying bird is a hawk, the young birds either become more agitated or cower to reduce the danger. It was first observed by Konrad Lorenz and Nikolaas Tinbergen.
Hypothesis: The hawk/goose effect is only observed in some older doves