our robins are different to yours. i have a beauty that keeps returning to my yard . european robinRobins are migratory, but they show up late winter and early spring. Maybe this one is still hanging around. I know a robin call. Stood there and looked but couldnt see anything but a silouette.
i grew the pure lebanese inside and outside pipe . the males were stable. the f1s i did not have many , nor did i testLebanese and some other landraces I think are more sensative to environments they aren't used to. Indoor growing alone can trigger it, whereas if they were grown outdoors, they may not develop intersex/hermi plants as much. Heard a couple breeders talking about this subject on the Potcast.