Gyula Gajdon, who is a co-author from the Department of Cognitive Biology in Vienna, adds: "The animals could choose which solution they wanted to employ first. Once they had established a solution and had used it a certain number of times we blocked the entrance, forcing them to switch to another. This way we could observe not only the differences in the order of solutions that the animals established but also how quickly they were able to switch."
Species champions "Kermit" und "Uek"
Just one animal of each species accomplished all four solutions. The most difficult solution for the kea was the use of a stick-like object as a tool. This is not surprising since the kea is not a natural tool user in the wild. Additionally, maneuvering an elongated tool inside a curved beak is a highly complex motor task. "It is therefore all the more impressive that Kermit succeeded to overcome this handicap. The strategy he used gives the strong impression that he acted in a goal directed matter," states Ludwig Huber.
The greatest challenge for the crow was to open a win
|Contact: Ludwig Huber|
University of Vienna