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.

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

Sponsor a Cuckoo

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.

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 28 April 2024

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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

KP heads for Ireland

29 Apr 2024

Rather than following a more land-based route, KP suddenly left northern Spain and set off due north, crossing the Bay of Biscay and continuing his flight over water, covering some 1,090 km (677 miles)!

Skirting past the Isles of Scilly and pushing north, at the time of his last signal KP was just 70km (43 miles) from the south east coast of Ireland. Once he makes landfall will he head straight to Killarney National Park, where he was tagged on 17 May last year?

Trent's true travels

29 Apr 2024

With a little encouragement from the southerly winds moving up through the continent, Trent powered north covering around 1,068km (663 miles) over the weekend.

Ater crossing the Channel he spent some time in Somerset before moving north again and is currently in the Malverns in Worcestershire. He is around 1km (.6 mile) away from where he was originally caught and tagged in May 2023!

Joe heads 'home'

29 Apr 2024

Demonstrating just how site-faithful these Cuckoos can be, Joe has arrived back in the Brecklands in  Norfolk, less than 20km (12 miles) from where he was tagged in early summer 2022. He is just five days later than his return to the same area in 2023.

Since leaving the Bordeaux region a few days ago, he has covered around 950km (590 miles), flying due north, crossing the Channel close to Bayeux and hitting UK soil around Bognor Regis.

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