I saw this individual about 1 month before. The progress of molt is delayed maybe because of nutritional states. I Know there are a few 1s individual of F. narcissina molt slower than typical 1s F. narcissina. Normally 1s F. narcissina obtains partial Ad-male type body feathers. F. owstoni and F. ellisae are slower than narcissina.
This 1s' song is too less variation. I recognized around 3 patterns... Songspot is in the area that Narcissus were seen every year and some Ad individual sing around this year. The time I watched, he was doing well.
The territories are not calm in May. Lot of male tries to gain own area. It is known that the individual coming to breeding ground faster is tend to gain high quality territory. The reason is faster has many knowledge about the territory ; be some advantage in struggle with slowermigrater. Which do you choice? twink & normal earnings or normal looks & high earning? I think some people choice twink & normal earnings. It seems to adaptive in considering after 2or3 generations. In Narcissus, twink (=good condition) & high earning (=high quality territory) has unimaginable popularity. And it is nature that twink has popularity because they has high quality territory since they come tobreeding ground faster. They afford to migrate faster because their body condition high. It is imaged that male cannnot ease up in wintering ground to get mate.