Important update! 🎉 We've satellite-tagged six Cuckoos this year in Scotland and England. Follow their migrations and sponsor a bird ➡️ https://www.bto.org/cuckoos 📉 The UK Cuckoo population has declined by over a third since the mid-1990s. But that’s not the whole story – while in England, Wales and Northern Ireland numbers continue to fall, they’re increasing in Scotland. By using satellite tracking technology, BTO researchers are gaining a greater understanding of the pressures Cuckoos face