Cuckoo Tracking Project

Cuckoo. Alan McFadyen

Help us follow Cuckoos on migration and discover why they are in decline

The Cuckoo is currently Red Listed as a Bird of Conservation Concern in the UK, due to its population decline.

Since 2011 we’ve been satellite-tracking Cuckoos to find out why they are declining. 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.

Skill required

  • Follow our Cuckoos on the map below - use the controls to animate or step through their movements.

Cuckoo movements from 01 May 2023 to 02 March 2024

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Cuckoo positions on
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Current Cuckoos

Bluey. Bluey


ID: 242385
Status: active
Cuach Carran. Cuach Carran Map Pin.

Cuach Carran

ID: 242389
Status: unknown
Cuach Cores. Cores

Cuach Cores

ID: 242386
Status: active
Cuach Torc. Torc

Cuach Torc

ID: 242384
Status: active
George. George


ID: 242387
Status: active
JAC the Cuckoo JAC


ID: 213805
Status: presumed dead
Jasper. Jasper


ID: 232668
Status: unknown
Joe, Cranwich Heath, 2022. PTT 232670 Joe


ID: 232670
Status: active


ID: 242388
Status: active
Cleeve (2023 tagged Cuckoo) Michael


ID: 242426
Status: unknown
Sayaan. Sayaan


ID: 242502
Status: active
Trent Trent


ID: 242383
Status: active

View previously tagged birds

Latest updates

Joe moves into the Republic of Congo

28 Feb 2024

Since our last update Joe has flown 250km (155 miles) north west from his last location in the Democratic Republic of the Congo, over the border into the Republic of Congo.

He is now in north-eastern Congo, approximately 85km south of the town of Impfondo. 

Trent moves into Guinea

21 Feb 2024

After a brief stop in Ivory Coast, Trent has flown a further 382km (237 miles) north-west, taking him over the border into Guinea.

He is now in the south-eastern corner of Guinea, approximately 33km (20 miles) south of the town of Senko. 

Joe in DRC

15 Feb 2024

Joe remains on his wintering grounds in the Congo Basin.

He is currently near a large oxbow lake on the Busira RIver in north-west Democratic Republic of the Congo. We expect to see Joe moving west soon.  

Browse updates from our Cuckoos

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Project timeline, contributions & findings

Project timeline

  • 5/11 - First round of five Cuckoos tagged, wintering sites in the Congo identified 
  • 3/12 - Different routes discovered on return journeys
  • 2016 - First scientific paper published on on the routes of our Cuckoos