However, very clear differences in relative brain mass emerged when birds showing play behaviour were compared to those that didn’t play. In particular, birds that played with others (known as social ...

Birds that play are more intelligent than those that don't, according to new research, which shows a link between birds having fun and their brain size. Those that play together are the brightest ...

Play behaviour is usually subdivided into three categories: solo play, object play and social play. Solo play: this may involve a single bird running, skipping, jumping, ducking, rolling, hanging ...