We see it often with crows (and seagulls) they just protect their area.
I was once attacked by 3 seagulls because we had to moor to a pole were they build their nest :S
I didn't like it 🙂
Twenty things to learn from our pets
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A very simple little bit of info from the web, but most of it is quite true. Have a great week everyone.
http://pets.webmd.com/ss/slideshow-things-you-learn-from-your-pet