Cuckoo Tracking Project

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

We’ve been satellite-tracking Cuckoos since 2011 to find out why they 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.
  • Find out how you can support our Cuckoo research >

Progress so far

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.

​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.

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

There are two ways you can support us and make a positive impact:

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 2023 to 22 April 2024

View routes starting..
Cuckoo positions on
 
 
 
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Current Cuckoos

Bluey. 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

George

ID: 242387
Status: active
JAC the Cuckoo JAC

JAC

ID: 213805
Status: presumed dead
Jasper. Jasper

Jasper

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

Joe

ID: 232670
Status: active
KP. KP

KP

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

Michael

ID: 242426
Status: unknown
Sayaan. Sayaan

Sayaan

ID: 242502
Status: active
Trent Trent

Trent

ID: 242383
Status: active

View previously tagged birds

Latest updates

Joe leads the way

22 Apr 2024

Joe continues to stick close to the Portuguese border and after a 172km (106 miles) journey north is now exploring the area just east of the town of Saucelle, close to the Arribes del Duero Natural Park.

Will his next big move see him heading north-east and into France west of the Pyrenees, or will he cut across a stretch of the Bay of Biscay and make landfall further north along the French coast?

KP continues northwards

22 Apr 2024

Lagging slightly behind Trent and Cuach Torc, KP has moved a comparatively leisurely 125km (77 miles) north since leaving the Sierra de Hornachuelos Natural Park area a few days ago.

He is currently just south of the municipality of Villarta de los Montes, in forest-clad mountains to the south of the Embalse de Cíjara, a large reservoir on the Guadiana River.

Trent trucks on

22 Apr 2024

Trent continues his trek north and has covered around 212km (131 miles) in recent days, since leaving the Sierra de Hornachuelos Natural Park area.

He is now in central Iberia, between the small towns of La Higuera and Lanzahita in the Castile and León province.

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