Super sniffer. A well-developed sense of smell may help the nocturnal kakapo find food in the dark. Photo:Don MertonHawks are famous for their sharp vision, and owls are renowned for their keen hearing, but birds rarely get much credit for their sense of smell. That may change thanks to the first analysis of olfactory genes in a wide range of avian species. Birds, it turns out, may be better smellers than we thought.

Researchers interested in bird behavior have tended to focus on their flashy mating displays, melodious songs, and other talents, leaving the avian sense of smell largely unexplored. A handful of studies have hinted that smell does play a role in bird behavior (ScienceNOW, 29 October 2004), but very little is known about the underlying biology.