Arranged from dark to light, this series of photos provides a decent range of tail patterns seen in immature American Herring Gulls.
All photos - East Spillway Access, Carlyle Lake, Clinton County, Illinois, January 1, 2010.
1. American Herring Gull - 1st cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
2. American Herring Gull - 1st cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
3. American Herring Gull - 1st cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
4. American Herring Gull - 1st cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
5. American Herring Gull - 1st cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
6. American Herring Gull - 1st cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
7. American Herring Gull - 2nd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
8. American Herring Gull - 2nd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
9. American Herring Gull - 2nd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
10. American Herring Gull - 2nd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
11. American Herring Gull - 2nd/3rd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
12. American Herring Gull - 2nd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
13. American Herring Gull - 2nd/3rd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
14. American Herring Gull - 3rd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
15. American Herring Gull - 3rd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
16. American Herring Gull - 3rd cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
17. American Herring Gull - 3rd/4th cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.
18. American Herring Gull - 3rd/4th cycle, East Spillway Access, Carlyle Lake, Clinton County, January 1, 2010.