I had guessed just from looking at it that it must be doing a stoop like a peregrine falcon.
Flying saucebacks have quite the ecological influence. They're probably going to be listed as a major development for this Week.
Just out of curiosity...what's its body temperature range, and how does it maintain it at such extreme altitudes? I ask because geese and turkey vultures, which are somewhat comparable, seem to have differing ways of regulating body temperatures. 10 km up would be -60 C (-76 Fahrenheit), assuming Earthlike conditions and that the following
sourceapplies. For comparison, the highest-flying kind of bird, the
bar-headed goose, seems to have a maximum of 7.29 kilometers up, and usually flies much lower.
It might not be out of the question huge blackflora forests could affect temperatures in the air above them, but I'm not sure if it would substantially lower temperatures that high up.