Kea

Keas are considered one of the smartest bird species in the world. They use tools and recognize their own reflection, they are playful, bright and take everything apart… including sheep. Yes, exactly. Keas have been observed attacking sheep in packs, scratching the fur and skin with their sharp claws to get at the body fat. This resulted in an estimated 150,000 kea being killed by the early 1970s.

In the Frankfurt Zoo they live somewhat hidden, behind the large playground and are definitely worth a visit.