Tracking Cuckoos to Africa... and back again

We’ve lost over half the number of Cuckoos in the UK over the last 20 years.

Since 2011 we’ve been satellite-tracking Cuckoos to find out why. We’ve learned lots of vital information which could help us to understand our Cuckoos -  such as how the different routes taken are linked to declines, and some of the pressures they face whilst on migration. 

But there is still more to discover. We now need to look more closely at how dependent they are on, and how much their migration is linked, to the drought-busting rains of the weather frontal system known as the Inter Tropical Convergence Zone (ITCZ) as they move out of the Congo rainforest and begin to head back to the UK via West Africa.

This project wouldn't have been possible without the amazing support from funders and sponsors. Read more about the project and find out how you can get involved.

We have been able to share our expertise around tracking Cuckoos with other international studies, such as the Beijing Cuckoo Project.

Follow our Cuckoos as they move to and from Africa.


Cuckoo movements from 10 May 2018 to 15 December 2018

View routes starting..
Cuckoo positions on

Latest News

Victor still in Gabon - 11 Dec 2018
Victor seems settled in the rainforest in central eastern Gabon. He has moved 19km (12 miles) south within the forest and is now quite close to Robinson, one of our other tagged Cuckoos. It might be that this is his winter site, although in the 2016 he wintered in Angola and in 2017, Gabon. He is currently midway between these two areas.
Thomas settled - 11 Dec 2018
Thomas is still settled in the rainforest in southwest Congo. He has moved around a little and is currently 40km (25 miles) south of his arrival point in the forest.
Sylvester lost - 11 Dec 2018
It is with a heavy heart that we have to report that we think Sylvester has died. Looking more closely at the data it seems that the location we received from his tag in the Central African Republic was erroneous - this happens occasionally. In actuallity, we last heard from Sylvester on 28 August in Nigeria, close to the River Niger. We have no clues as to what might have happened to him.

Get involved

Find out how you can support the project, or contact us directly for further details - cuckoos [at]

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