Patricia Backwell is a biologist working on the behavioural ecology of fiddler crabs. These are small, brightly coloured animals that live in mangrove forests. Male fiddler crabs are interesting because they have a single hugely enlarged claw that they wave to attract females for mating. They also use the claw as a weapon when fighting other males for territories. Pat studies the social behaviour of these crabs, with special emphasis on mating, fighting and signalling. Pat, along with a number of students, will spend four months each year for the next few years studying the fiddler crabs in the Territory.