BTO | British Trust for Ornithology

1/ It’s Cuckoo time! Meet the new recruits for 2026, and follow their migrations to Africa! ➡️ www.bto.org/cuckoos 🌍 🔴 Since 1995, the number of Cuckoos has decreased by over 30%. 📽️ Video showing BTO team tagging and releasing a Cuckoo.