Personality types in great tits.

Fast individuals exhibit aggressive behavior, approach novel objects quickly, and form a pattern for foraging.

When paired with tutor birds who provide them with information about new food sources, fast birds can change their foraging pattern, acting as scroungers.

Slow individuals are nonaggressive, avoid novel objects, and often change their foraging routines, regardless of whether they obtain any information from tutors.

Thus slow tits act as producers.