Volker Dierschke
@vdierschke.bsky.social
Seabird researcher (linked to DDA); enthusiastic birdwatcher
At Helgoland, German North Sea, breeding success was 42%. Fairly good, but population down to 25 pairs (was 120 pairs 20 years ago).
August 26, 2025 at 8:28 PM
At Helgoland, German North Sea, breeding success was 42%. Fairly good, but population down to 25 pairs (was 120 pairs 20 years ago).
The bird is from the Swedish colour-ringing scheme.
August 18, 2024 at 8:22 AM
The bird is from the Swedish colour-ringing scheme.