Tinberg's 4 "why" questions

Why do birds sing at dawn?

Causation

Ontogeny

Function

Phylogeny

Pitfall of studying behaviour

Info provided by communication

Communication definition

Signal definition

Cues definition

How do signals evolve?

Cue revealing autonomic stimulation

Ritualisation of cues revealing behaviour

"Displacement" behaviour

How ritualised signals differ from cues (4)

How ritualisation aids communication

Signal evolution

Uses of signalling

Aposematism