Which bird does this feather come from?
Which bird does this black and brown feather come from?
Do only the males wear a breeding plumage?
Most birds have what's known as breeding plumage during mating season. But do only the males have breeding plumage, or do the females also, or are both present? Are there some where both have breeding plumage, and if so, which ones? I mean, for example, I've never seen a black-headed gull at that time of…