Honours student Tom Claridge and supervisor Joanne Connolly hold an adult female platypus in Wagga Wagga, NSW.

Adult male platypus captured from Murrumbidgee River, after his release in April 2009.

Study of the adult male platypus from Scottsdale Reserve.

Juvenile male platypus from Brumbys Creek, Tasmania.

Anthony Dutton gets a close look at an adult female platypus in Wagga Wagga as his mother, Joanne Connolly, watches on.

A captured platypus has its body length measured.

An adult male platypus captured from Murrumbidgee River at Scottsdale Reserve.

The first platypus captured in the NSW Murrumbidgee catchment study on 19 April 2001. A healthy adult male from the Goodradigbee River at Wee Jasper.