Adult Herring Gull Green YCAV with advanced primary moult – 20160520

While color-ringing adult European Herring Gulls in the colony of IJmuiden, we caught this female showing some interesting wing moult.

Primaries P1 and P2 were already half-grown whereas most adult Herring Gulls at this time of year have either just started dropping these primaries or have yet to start their moult.



We took a moment to have a closeup look at these incoming primaries and it was interesting to see the new feathers emerging from their pins.


IJmuiden (Forteiland), the Netherlands, 20 May 2016.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.