>Adult Lesser Black Backs are smaller than Herring Gulls, their back is actually >a slaty gray rather than black, and they have yellow legs Alan, In addition to Wendy's notes, the adult winter (or basic) plumage has a degree of darkish streaking on the head and neck. The amount varies but is sometimes useful as adult Greater Black backs have very clean looking heads. Hope this helps. Arun Bose, Richmond You are subscribed to VA-Richmond-General. To unsubscribe, send email to va-richmond-general-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field. To adjust other settings (vacation, digest, etc.) please visit, http://www.freelists.org/list/va-richmond-general.