BBC Breakfast host Dan Walker had to withhold his laughter as an animal expert began to chime strange owl noises live on the show.Dan, 44, managed to raise a smile but maintained composure as the zoologist described the "twit twit twoo" sounds that different owls make.Nanette Davies from the Vale Royal Falcony Centre, who appeared with Tara the Tawny Owl on the programme, was able to distinguish difference between male and females by their chirp.Dan asked: "So Tawny Owls are these the one's that make to twit twoo noises?"In response, Nanette said: "They are, this is it, this is the owl that everybody asks me, what is it that I hear at night?"They're sort of heard and not seen, females do that classic 'cuwweek' or 'tooweet' and the males.
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