Anthropomorphism means the attribution of human characteristics, motivations, and behaviors to animals (and other elements in nature). Primary author Douglas Adams has a penchant for anthropomorphism, first seen when an aye-aye lemur looks at him with "serene incomprehension," which he returns in kind. He regularly reminds himself that it is irrational but is rarely able to resist. The only consistent exception comes with birds, for whom he feels no natural affinity. Forming the opinion that fat, flightless kakapos are "innocent and solemn," he wants to see one and warm up to it.