|Typical mid-May Ring-billed Gull (second calendar year). |
The 3 innermost primaries have dropped. Tinley Park, IL. 21 May 2016.
|1st Summer Ring-billed with obvious molt gap where the secondaries & primaries meet.|
The innermost primary and outermost secondary have emerged.
Tinley Park, Illinois. 07 May 2016.
This individual has dropped a few secondaries and a couple of primaries:
|P1-P2 new. P7 appears 2nd generation. Tinley Park, IL. 21 May 2016.|
|Same individual above. Both P1-P2 new. P7 old.|