Overview

• Scientists trained three carrion crows to produce specific numbers of vocalizations in response to visual and auditory cues.
• The birds demonstrated a high accuracy rate for lower numbers, with decreasing precision as the numbers increased.
• Researchers observed that crows took longer to respond to higher numbers, suggesting mental planning.
• The study adds evidence that certain bird species can communicate numerical information.
• Future research aims to explore how crows use this counting ability in the wild and its neurological basis.