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Seabirds have the longest migrations on earth and can travel 8 million km in a lifetime, yet how they navigate across a seemingly featureless ocean is still one of the greatest puzzles in nature. Evidence from mammalian and insect system shows that animals adjust their behaviour in response to infrasound and a handful of studies have suggested pigeons may use infrasound for navigation. The properties of the low frequency sound waves can be used to map topology and even detect weather systems. Combining the network of 48 international infrasound monitoring stations, detecting signals from around the globe, with the ocean wanderers database of over 15,000 seabird movement tracks, we have a unique opportunity to explore the role of sound in navigation. Furthermore novel biologging devices, which can detect sound and pressure, will be used to simultaneously capture movement and infrasound to examine individual movement decisions at fine scale. The physiological mechanism allowing animals to detect low frequencies has been identified in other taxa, and our study will examine how seabird sensory organs may capture infrasound offering a complete assessment of the physiology, behaviour and physics unpinning the use of infrasound in navigation.