Robins have one of the most recognisable calls among songbirds, with their sharp warbles producing melodic songs that can be heard in gardens throughout Europe.
But as it turns out, those calls are a warning sign.
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Despite their friendly demeanour around humans, robins can be fiercely territorial among rivals (particularly in the breeding season) and their weapon of choice is their song.
Unlike most birds, robins hold their territory all year round as they don’t migrate. In the colder months, young birds have fledged and resources become scarcer, leading to more battles over your back garden than you might think.
Both male and female birds hold their territories and will drive off intruders using their song, but they’ve even been known to fight with persistent pursuers – although one will likely back down before any casualties occur.
Studies in Europe have also shown how urban lights and noise can affect the song and behaviour of robins, with town robins being typically more aggressive than country ones.
You’ll notice that their alarm call is a loud ticking sound which serves as a ‘back off’ instruction. However, robins will make similar noises to warn others when predators (such as foxes or domestic cats) are nearby, and their sweet song may change into a repeating ‘tick’ or a single high-pitched call.
