Turtle doves are the fastest declining bird in the UK - their population is halving every six years. Why is this happening and what can be done to help? On this month's Nature's Voice Jane Markham talks to the RSPB's Senior Conservation Scientist Dr John Mallord who has been part of Operation Turtle Dove. His work with Titan the turtle dove – who was satellite tagged two seasons ago - has produced a huge amount of information. She also meets Samantha Lee who works with landowners in the east of England to help improve the habitat on their key breeding grounds.