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 28 June 2024

View routes starting..
Cuckoo positions on
 
 
 
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Current Cuckoos

Cleeve

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

Cuthbert

ID: 262937
Status: active

George 2

ID: 262934
Status: active

Hafren

ID: 262938
Status: active

Henry

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

Joe

ID: 232670
Status: active
KP. KP

KP

ID: 242388
Status: active

MacSporran

ID: 262931
Status: active

Nick 2

ID: 262928
Status: active
Sayaan. Sayaan

Sayaan

ID: 242502
Status: active

Severn

ID: 262932
Status: active
Trent Trent

Trent

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

Wilfrid

ID: 262936
Status: active

View previously tagged birds

Latest updates

Catalonia for Cleeve

27 Jun 2024

Cleeve seems to be wasting little time, and since our last update just four days ago, he has flown a remarkable 975 km, (605 miles) from northern France down to the Pyrenees. 

He is now just over the border into Spain, approximately 18 km (11 miles) south-east of Andorra, and close to Cadí-Moixeró Natural Park, in the north of Catalonia.

Wherefore art Cuach Torc?

27 Jun 2024

Earlier this week Cuach Torc crossed the border into Italy from Switzerland.

He stopped for a short while just north of the UNESCO world heritage city of Verona, famously the home of Romeo and Juliet. From here Torc then moved a further 120 km (75 miles) to the coast just south of Venice.

In the next few days he could either continue down through Italy, or follow the route he did last year, via Bosnia and Herzegovina and on into Greece! 

Sayaan swoops southwards

27 Jun 2024

Since leaving the Dijon area in western France a few days ago, Sayaan has flown some 463 km (287 miles), skirting Switzerland, and crossing into Italy just to the west of Turin.

He is now in the Piedmont region, just north of Genoa, from where his next move should see him heading south through Italy and on towards the Mediterranean.

Browse updates from our Cuckoos

Project Lead
Email Contact:
cuckoos@bto.org

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