BTO have just issued a bulletin on the movements of its tagged Cuckoos in Africa including mine, JAC.
Llangollen Cuckoo JAC has been giving us the run around, an 
erroneous signal received a couple of weeks ago suggested he had already
 flown from his wintering grounds in the Congo Basin directly to Ivory 
Coast. The next signal we received however showed him back east in 
Cameroon. Over the past week we have received several high quality 
signals that show that JAC has now made his way to Ivory Coast, albeit 
at a more leisurely pace than we originally thought! JAC is now in 
eastern Ivory Coast approximately 107km (66 miles) north east of the 
capital Yamoussoukro and 89km east of Cuckoo PJ.