Irregular reinforcement dating
If such a behavior is even partly genetically determined, it will tend to become widespread in the population.
Then, even if circumstances change such that it no longer provides any survival or reproductive advantage, the behavior will still tend to be exhibited -- unless it becomes positively disadvantageous in the new environment.
It is an arrangement of small timbers (wattle) that form a matrix to support a mud-based daub."Boundless offers beautifully designed, accessible anywhere courseware.It allows me to create learning experiences where students' notes, thoughts, work, assessments, and guiding materials are all located in one place and easily findable on multiple devices." Kevin B.The daub was applied simultaneously from both sides in 'cats' (damp, workable balls) pressed into and around the wattle in order to form a homogeneous mass.As the daub dried it was often keyed by scratching or 'pecking'.