note- trailing secondary wing notch is present in these high flying specimens. The primary flight quill that fills in that notch is visible and growing in the photo of the Siamese- evidently the last flight quill to mature. The trailing secondary wing notch is much reduced through the period of the year when the train does not extend far beyond the retrices.- during moult and during regrowth. The Sri Lanka peafowl is a few months further along in annual train development as we can assuage from the length of the train. The wing notch is closed during the last few weeks of the reproductive period about three- five weeks before the train begins to moult. Here's a photo of a Black-Shouldered male in flight. You can almost make out the under wing. I don't have any or I'd photograph them for you. Quote:I do hope those of you rearing peafowl can contribute toward Clinton9's efforts. It's been a very long while since anyone gave the natural history and physiology of peafowl their due. Clinton9 please repost your illustrations here.