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News from the nesting box – territorial behaviour amongst birds

The latest footage from the campus nesting box is not for the faint-hearted! We can see just how brutal territorial defence can be among breeding owls.

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Over the past few days, we’ve been able to see via the camera in the nesting box on House 2 that you shouldn’t mess with owls that are brooding. First we spotted a lifeless male kestrel in the nest, and now a female too. Meanwhile, the female tawny owl continues to brood peacefully. Well, that’s nature!

It’s important to realise that the tawny owl is actually a classic mouse hunter. However, it is also territorial and fiercely defends its brood. This is probably why the pair of kestrels approached the nest one after the other, only to be fended off and killed. This was primarily about defending the territory rather than securing the prey – that’s more of a practical side effect for the female tawny owl, who is otherwise looked after by the male.

The female tawny owl has now been incubating two eggs for several days and will probably remain occupied with this for the next three weeks. We’ll be keeping a close eye on things!