en 
Nederlands
Projects
| name | actions |
|---|---|
| Arctic Tern, blue red white or yellow ring with 2 characters | info |
| Blackbird, 1 letter-ring + 2 plain rings | info |
| Blackbird, 3 colour rings + metal ring (the Netherlands - Berg en Dal) | info |
| Black-crowned Night Heron, white ring with 2 letters | info |
| Black-headed Gull, 1 ring with 2 characters | info |
| Black-headed Gull, white ring with 3 characters (first=L) | info |
| Black-headed Gull, white ring with 4 characters (first=E) | info |
| Black-headed Gull, white ring with 4 characters (first=S) | info |
| Black-headed Gull, yellow ring with 5 characters (first=S) | info |
| Black-legged Kittiwake, white ring with 2 characters (letter and 3/4/6/7/9) | info |
| Common Buzzard, 1 red or dark green ring with 2 characters | info |
| Common Coot, 1 orange ring with 3 characters | info |
| Common Moorhen, 1 orange ring with 3 characters (first=C or S) | info |
| Common Ringed Plover, 1 white ring with 2 characters | info |
| Common Ringed Plover, unengraved blue ring and white ring with 3 characters (first=A) | info |
| Common Tern, black blue green or lime ring with 3 characters (first=N) | info |
| Common Tern, black blue lime white yellow ring with 3 characters (first=H) | info |
| Common Tern, black or yellow ring with 3 characters and at least 2 letters (first=L) | info |
| Common tern, black ring with 3 characters (first=S) | info |
| Common Tern, black white or yellow ring with 2 digits and a letter L | info |
| Common Tern, blue ring with 2 digits | info |
| Common Tern, blue ring with 2 digits and an A on first or last position | info |
| Common Tern, blue ring with 2 letters (first=K V or Z) | info |
| Common Tern, red or white ring with 3 digits (first=3) | info |
| Common Tern, white flag with 3 characters (first=N P R S or T) | info |
Look at the help page for more information.
Contact helpdesk@cr-birding.org for support and more information.
