ELIZABETH PRESTON: ‘A series of experiments demonstrated that African grey parrots had something like social intelligence in addition to their cleverness… They’re the first non-mammals observed helping each other in this way, suggesting other animals have evolved the ability to act selflessly. Parrots were already known to be clever. Irene Pepperberg, an animal psychologist, famously … Continue reading STUDY: Parrots Show Selfless Behavior