To pull or push? Performance of four passerine species in the lever-pulling task

Area of Science:

• Avian cognition
• Comparative psychology
• Animal behavior

Background:

• Avian cognition research often overlooks diverse bird species, focusing on a few taxa with known high cognitive abilities.
• Comparative studies are crucial for understanding adaptation and innovation in changing environments.
• Problem-solving tasks, like lever-pulling, offer insights into cognitive mechanisms and motor skills in birds.

Purpose of the Study:

• To investigate problem-solving abilities in understudied small passerine species (coal tits, nuthatches) compared to well-studied ones (blue tits, great tits).
• To explore the link between foraging strategies (food-storing vs. non-storing) and problem-solving performance.
• To identify individual traits influencing success in a novel cognitive task.

Main Methods:

• A food-motivated lever-pulling task was used to test problem-solving skills.
• Wild-caught adults and hand-reared juveniles of four species (blue tits, great tits, coal tits, nuthatches) were tested.
• Behavioral analysis focused on success rates, speed, and influencing factors.

Main Results:

• Species-specific differences were observed in juveniles, with coal tits and nuthatches showing greater success.
• Juveniles solved the task faster than adults, though both age groups performed similarly overall.
• Individual traits like persistence, accuracy, and motivation positively influenced success, while initial approach latency did not.

Conclusions:

• Foraging strategy (food-storing) may be linked to enhanced problem-solving capabilities in small passerines.
• Individual behavioral traits play a significant role in innovative problem-solving.
• This study highlights the importance of including diverse species in avian cognition research.