Yes, it's a bird.
Peregrine's are a tad tricky to say the least which is why i was delighted to find this radio-controlled one in my local model shop.
Birds in flight is one of the rare situations where i will use grown-up 'full manual' mode, as although it initially takes a little more effort than my default / preference for aperture priority it is simple enough when you get used to it.
Anyone interested, do drop me a line - i have a very very simple way of doing it.
Pets and captive animals
Wildlife and nature
Raptor photography tuition
Ade_Osman, Rapido57, gwynn56 and 6 more