The following pair of images of the owl & Kestrel were taken a few years ago at Aust & "lost" on my hard drive. I found them when loading the new images!
Short-eared owls are commonly seen during daylight (diurnal) & feed on the same sort of creatures as Kestrels. This leads to competition for resources & inevitably fights. Corvids also give the owls are hard time, & can often be used to find owls that are perched or roosting in reeds or long grass.