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JAC is named in loving memory of Professor Jenny Clack, a world-class palaeontologist, widely acknowledged as the leading authority on the evolution of land vertebrates from fish. The name JAC was chosen by Jenny's husband Rob who said "It seemed appropriate I should contribute to this important scientific study of cuckoos in memory of a top-class scientist, whom I adored."

JAC the Cuckoo
Tuesday, June 1, 2021 - 05:00
Tagging Location:
World's End, Llangollen, Denbighshire
Age when found:
Satellite Tag No.:
Wing Length (mm):

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JAC's journey from 01 June 2021 to 25 November 2021

JAC's position on
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JAC's movements

02 Nov 2021 - JAC crosses the Congo River

Over the last few days Llangollen Cuckoo JAC has left the Republic of the Congo, flying 235 km (146 miles) east into the Democratic Republic of Congo. He is now 40 km (24 miles) north of Lake Tumba and within the Tumba-Ngiri-Maindombe wetlands, the largest Wetland of International Importance in the world. He is within a vast area of moist tropical forest covering an area more than twice the size of Belgium. 

12 Oct 2021 - JAC flies to the Congo

Over the last few days JAC has flown 866 Km (538 miles) south east from Cameroon to the Republic of Congo. He is now deep within the Congo rainforest, close to the Likouala River, a tributary of the Congo. 

06 Oct 2021 - JAC crosses into Cameroon

New updates from JAC's tag received between 05:25 and 09:17 yesterday morning (Tuesday 5 October) show that JAC has flown 745 Km (463 miles) south east from Nigeria to Cameroon. He is now just east of Bafoussam, a city in the highlands of western Cameroon.

22 Aug 2021 - JAC pushes further into Nigeria

Since our last update, JAC has flown 357 Km (222 miles) south east into central Nigeria. He is now 200 Km north of the capital Abuja and just 55 Km south of Worcestershire Cuckoo Calypso. 

03 Aug 2021 - JAC moves to Nigeria via Niger and Benin

Since leaving Burkina Faso, it looks as if JAC has been on a mission to tick off as many countries as possible over the last few days. In the space of 187 Km, he has visited Benin, Niger, and Nigeria. He is now in north west Nigeria. 

Past updates from Jac

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© British Trust for Ornithology.