Last evening, I enjoyed a late Vimto in the garden as darkness decended. The cat was nearby, hoping for some cheese. A male tawny owl was calling some way off, but the youngsters nearby had not yet woken up.
The cat seemed ill at ease, looking towards an overhanging tree.
Suddenly, there was a loud "weep, weep, weep" from the tree, and the cat ran off across the garden. It was swooped upon by an adult owl, which swatted it with an audible thump, then circled low over the garden a couple of times before landing at the top of a nearby tree, silhouetted against the sky.
After some minutes of standing sentinel, the owl (presumably the mother of the twins) was reassured that the cat had been scared away from her youngsters, and flew off. Soon after, the twins started their familiar wheezing calls.
Elsewhere, another pair of twins (little owls this time) emerge blinking in the bright sunlight, with a parent scanning the fields for food.