Cuckoo Tracking Project

Help us track Cuckoos and learn even more about their epic migration

We’ve been satellite-tracking Cuckoos since 2011. We’ve learned lots of vital information, such as how the different migration routes are linked to declines, and some of the pressures Cuckoos face whilst on migration, but there is still much more to discover.

An important aspect of this project is how it helps us improve our understanding of why Cuckoo are in decline:

  • Since 1995, the number of Cuckoos has decreased by over 30%.
  • The Cuckoo is currently Red-listed as a Bird of Conservation Concern in the UK.

Our Cuckoo Tracking Project is vital and it wouldn’t be possible without the amazing support from funders and sponsors.

Sponsor a Cuckoo

​What’s next

We now need to look more closely at how dependent Cuckoos 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.

Watch the Cuckoos migrate on our map

Each Cuckoo’s tag sends us location data approximately every day, so we can follow them and learn more about their migration.

Time / skill required

  • Spend as much time as you like following each Cuckoo's migration on the map below - use the controls to animate or step through their movements.
  • No technical skills are required to support this project - just a love of Cuckoos.

Cuckoo movements from 01 May 2024 to 13 June 2024

View routes starting..
Cuckoo positions on
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Current Cuckoos


ID: 262930
Status: active
Cuach Cores. Cores

Cuach Cores

ID: 242386
Status: active
Cuach Torc. Torc

Cuach Torc

ID: 242384
Status: active
Cuthbert, tagged Cuckoo, 2024 cohort / BTO


ID: 262937
Status: active

George 2

ID: 262934
Status: active


ID: 262938
Status: active


ID: 262933
Status: active
Joe, Cranwich Heath, 2022. PTT 232670 Joe


ID: 232670
Status: active


ID: 242388
Status: active


ID: 262931
Status: active

Nick 2

ID: 262928
Status: active
Sayaan. Sayaan


ID: 242502
Status: active


ID: 262932
Status: active
Trent Trent


ID: 242383
Status: active
Wilfred, tagged Cuckoo, 2024 cohort / BTO


ID: 262936
Status: active

View previously tagged birds

Latest updates

Cuach Torc sets off

13 Jun 2024

Having made a move to the County Waterford coast from Killarney National Park several days ago, Torc has now finally set off from Ireland, after a stay of 45 days.  

He flew a relatively short distance of 276 km (171 miles) to Cornwall, where he is currently just to the east of Falmouth. The second of our tagged birds to head south after the breeding season, his next move should see him making the 180 or kilometres (110 miles) to France in the coming days.

Cores heads into France

13 Jun 2024

Since leaving Ireland and arriving in north-west France a week ago, Cuach Cores has been taking it relatively easy, moving slowly south-eastwards into the Loire-Atlantique region.

Currently just north of the medieval town of Châteaubriant, he will likely head towards Italy and head down to Africa via an eastern route.

The end of the road for Bluey

07 Jun 2024

With no updates since April, we have to conclude that, very sadly, we've probably heard the last from Bluey. We had already lost him once, but against the odds we were able to recatch him on his breeding grounds and so, his has been a particularly exciting journey to follow. We can't be sure why we have lost contact with him this time, so who knows, perhaps we'll encounter him again in future. 

Browse updates from our Cuckoos

Project Lead
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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