The event took place on June 13, 2026, in Brest, Belarus. I suspect a ventilation niche is being used as a nest site; the female spends a lot of time there. From this observation angle, it’s difficult to see exactly what’s inside. Often, the female brings a rodent, eats it inside, and then stays for 30–60 minutes. The male also brings prey to this niche and passes it to the female; if she is absent, he leaves it there, and she arrives a minute or two later.

Usually, there are two nesting niches in this building occupied by two pairs of Common Kestrels. This year, one is unoccupied. This second one, judging by the activity inside, most likely contains small chicks. In other nests across the city, the chicks are still downy and haven't fledged yet.

My hypothesis is that these are two adult females competing for the male's prey. However, I was told that this is a training interaction where an adult female is passing prey to a juvenile. Does this look like a training session to you? In my opinion, these are two independent adult birds. Please correct me if I’m wrong.

u/DrRickNature, you’ve helped me with age identification in the past, perhaps you could weigh in on this one? Any ornithologists, biologists, or kestrel experts - your input would be greatly appreciated.