A pair of Wrens in the wildlife garden called their rattling alarm calls. I am always intrigued by alarm calls. Many alarm calls are directed to the bird watcher, as we approach a nest or a bird more than it is comfortable with. In this case, the birds were directing their attention to a cat, which was going about its business in the undergrowth. The pair of wrens moved constantly around, chattering nervously. A Goldfinch sat on a branch paying a lot of attention, but keeping quiet. On the top is my best shot of one of the Wrens, and you can see a little video here.