Audio slideshow: The Dog and the Whale
Sniffer dog Tucker uses his nose to help researchers find out why a killer whale population off the northwest coast of the United States is in decline. He searches for whale faeces floating on the surface of the water, which are then collected for examination.
He is one of an elite team of detection dogs used by scientists studying a number of species including right whales and killer whales.
成人快手 Radio 4 reporter Andrew Luck-Baker travelled to the Pacific Ocean to meet the black Labrador and his handlers.
Continue reading the main storyThe Dog and the Whale can be heard on 成人快手 Radio 4 at 2102 BST on Tuesday 19 October 2010. It will then be available on the 成人快手 iPlayer.
All images subject to copyright. Slideshow production by Paul Kerley. Publication date 19 October 2010.
Related:
More audio slideshows:
Drones bounce back from collisions