@Bl69aze, apologies if you though my question rhetoric and therefore criticising. It wasn’t. I was wanting to understand the origins of this misconception so I could better help you correct it.
The dark head patch and nape band of neonates fade as they grow, but at different rates in different individuals. What you may have seen was a photo of an individual in which this took place slowly and so it was already beginning to show adult colouration. Also, as has been described and shown, this is a highly variable species. That makes it difficult to cover all the possibilities in a Wall Chart ID Guide. The
one thing they definitely all do have in common is the head & neck pattern when young. As a result this may have been given undue emphasis… maybe?
Irrespective, sorry for the confusion and please, do keep asking questions.