David Lindo talks about the House Martin as part of the BTO's Out of Africa campaign. Many of our summer migrants are declining and the BTO is involved in research projects in Africa to try and find out why. To find out more about our declining summer migrants visit the BTO's A2B arrival calendar at www.bto.org/appeals/a2b/ and to learn more about our Out of Africa appeal, visit the BTO's website: www.bto.org/appeals/out_of_africa_appeal.htm
