Visual signals

What is communication (biological)?

A sender produces a signal that contains information, a receiver detects it, and both usually benefit.

Name the main channels for animal communication.

Vision, audition, substrate vibrations, chemical, touch, electrical fields.

What distinguishes passive vs active visual signals?

Passive signals are inherent (coloration); active signals involve movement or displays.

What is a display?

A stereotyped sequence of behaviors with a signaling function.

Give three advantages of visual signals.

Effective over long distances, fast transmission, can work while moving.

Give two disadvantages of visual signals.

Requires clear line of sight and usually daylight; can be intercepted by predators.