High level of self-control ability in a small passerine bird

Area of Science:

• Animal Cognition
• Behavioral Ecology
• Comparative Psychology

Background:

• Cognitive advancement in animals is often linked to self-control, the ability to forgo immediate rewards for delayed ones.
• It is widely assumed that larger absolute brain volume correlates with higher self-control capabilities.
• This assumption suggests that large-brained species should outperform smaller-brained ones in self-control tasks.

Purpose of the Study:

• To investigate the self-control abilities of the great tit, a small passerine bird.
• To challenge the prevailing notion that absolute brain volume is the primary determinant of self-control.
• To compare the self-control performance of great tits with that of cognitively advanced species like corvids and apes.

Main Methods:

• Utilized the transparent cylinder test, a standard method for assessing animal self-control.
• In this test, animals must retrieve food from a transparent cylinder without attempting to access it through the walls.
• Recorded the success rate of great tits in obtaining the food via the designated opening, indicating self-control.

Main Results:

• Great tits achieved an average success rate of 80% in the self-control test.
• This performance level is higher than most tested animal species and comparable to corvids and apes.
• Remarkably, this high performance was observed despite the great tit's significantly smaller brain volume relative to corvids and chimpanzees.

Conclusions:

• The great tit exhibits a high level of self-control, challenging the brain volume hypothesis.
• The transparent cylinder test effectively measures self-control, with great tits demonstrating proficiency.
• This study highlights that cognitive abilities like self-control are not solely dependent on absolute brain size, even in small-brained species.