"Human Behaviour" is Icelandic singer Björk's first solo single, taken from the album Debut. It contains a sample of "Go Down Dying" by Antonio Carlos Jobim. The lyrics reflect on human nature and emotion from an animal's point of view. The song is the first part of a trilogy that includes "Isobel" and "Bachelorette".

"Human Behaviour" was an underground smash, and reached #36 in the UK Singles Chart. It is often performed on her recent concerts as an encore.