Welcome to the world of the Manx Shearwater, the great secret of the Pembrokeshire islands. Nocturnal and mysterious, Dream Island has over 100 thousand of them.
They are normally almost impossible to see, but not only will we see them, we will also join the scientists using the latest hi tech field equipment to get to the bottom of the mystery still surrounding much of their behaviour.
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An overcast and damp start for most. By lunchtime it should be mostly dry but the skies will stay largely cloudy.