Jump to content
Whatbird Community

Glaucous Gull Confirmation.

Recommended Posts

Yes, many of the arctic-breeding large, white-headed gulls have a delayed preformative molt, with many individuals found on winter grounds being in what is, essentially, full juvenile plumage.  However, that preformative molt is often/usually commenced before February, thus it can be tricky to differentiate between juveniles and some immatures (non-adult birds that have replaced at least some juvenile plumage) in mid-winter.  Thus, first-cycle is a safer term, though the bird does looks like its almost entirely in juvenile plumage.

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...