"Avian Intelligence: Birds Match Primates in Cognitive Test"
A new study confirms that Oriental pied hornbills possess advanced object permanence skills, similar to those of primates, allowing them to understand that objects and animals still exist even when out of sight. Researchers tested six hornbills and found that all were able to demonstrate an understanding of visible displacement, with three birds even succeeding in understanding invisible displacement. This suggests that hornbills may possess highly intelligent cognitive abilities comparable to those of parrots and corvids, indicating the need for further research into their cognitive capabilities.