Coordinators:
Keith Mueller
Amar Ayyash
Mars Muusse
Index ORG
ring projects
PDF's
1cy June
1cy July
1cy Aug
1cy Sept
1cy Oct
1cy Nov
1cy Dec
2cy Jan
2cy Feb
2cy March
2cy April
2cy May
2cy June
2cy July
2cy Aug
2cy Sept
2cy Oct
2cy Nov
2cy Dec
3cy Jan
3cy Feb
3cy March
3cy April
3cy May
3cy June
3cy July
3cy Aug
3cy Sept
3cy Oct
3cy Nov
3cy Dec
adult Jan
adult Feb
adult March
adult April
adult May
adult June
adult July
adult Aug
adult Sept
adult Oct
adult Nov
adult Dec |
Ring-billed Gull delawarensis 2nd cycle (3CY), January 03 2012, Seward Park, Seattle. Picture: Amar Ayyash.
See Amar's blog.
2nd cycle RBGU. Beside the thicker bill and paler upperparts, Ring-billed averages a much smaller mirror on P10 and lacks the thick trailing edge shown by Mew.
|
delawarensis Ring-billed Gull